SnapMirrorの転送先がTiering Policy Allの場合においても転送元でInactive data compressionをかけるメリットはあるのか
こんにちは、のんピ(@non____97)です。
皆さんはSnapMirrorの転送先のTiering Policy Allの場合においても転送先のストレージコストを抑えるために転送元でInactive data compressionをかけるメリットはあるのか気になったことはありますか? 私はあります。
ポイントは「わざわざ」Inactive data compressionを転送元で実行するメリットがあるかです。
以下記事で検証しているとおり、SSD上で圧縮がかかっているかどうかに関わらずキャパシティプールストレージに階層化するタイミングで別途圧縮がかかります。
そのため、「キャパシティプールストレージ上の物理データ使用量削減のため」にSnapMirrorの転送元でInactive data compressionを無理に実行する必要性はないと考えます。
それでは、転送先がTiering Policy Allの場合においても転送元でInactive data compressionをかけるメリットはないのでしょうか。
上述以外に何かメリットがあるのか気になってきました。
検証のポイントは以下になります。
- そもそも、Inactive data compressionのデータ削減効果を維持した状態でSnapMirrorで転送できるか
- 転送後、キャパシティプールストレージに階層化されたデータをSSDに書き戻す際に圧縮した状態で書き戻せられるか
1つ目のについては以下記事でも確認しています。以下記事では重複排除も並行して行なっています。今回はより分かりやすくするため、重複排除はかけずにInactive data compressionのみをかけた状態でSnapMirrorで転送を行います。
「キャパシティプールストレージに階層化されたデータをSSDに書き戻す際に圧縮した状態で書き戻せられるか」は以下記事でも確認しています。検証結果としては「圧縮した状態で書き戻せられる」「圧縮した状態で描き戻せられない」になります。今回はそれに加えて「SnapMirrorの転送元でInactivee data compressionされたデータの場合」という条件を付け加えた形になります。
実際にやってみました。
いきなりまとめ
- SnapMirrorの転送先がTiering Policy Allの場合においても転送元でInactive data compressionを実行するメリットはある
- SnapMirrorはInactive data compressionのデータ削減効果を維持した状態で転送できる
- Tiering PolicyがAllであっても一度SSDに書き込まれる
- SSDを圧迫しないように、余裕を持ってSSDのサイズをプロビジョニングしたり、帯域制御を操作したりすることが必要
- Inactive data compressionを実行することで少ないSSDでも捌けられる量が増える
- 結果としてSSDのプロビジョニングするサイズを抑えることにつながる
- SnapMirrorの転送量自体が少なくなるため、転送時間および転送量にかかる料金を抑えるという点においてもメリットがある
- ただし、Inactive data compressionは1つのファイルシステムに同時に1ボリュームしか実行できないため、トータルの移行作業の時間削減にプラスの影響があるかは要検討
- SnapMirrorで転送されたデータをキャパシティプールストレージに階層化してからSSDに書き戻すと、転送元でかかっていた圧縮によるデータ削減効果が失われるのは注意が必要
- キャパシティプールストレージからSSDに書き戻すと、SSDの物理データ使用量がキャパシティプールストレージの物理データ使用量よりも増加してしまう
- 「キャパシティプールストレージ上の物理データ使用量削減のため」にSnapMirrorの転送元でInactive data compressionを無理に実行する必要性はない
- キャパシティプールストレージ上で別途圧縮がかかるため
- Inactive data compressionでスキャン済みのデータは、Inactive data compression再実行時に再スキャンされない
やってみた
検証環境
検証環境は以下のとおりです。
SnapMirrorの転送元FSxN(以降FSxN 1)は以下記事で使った環境を再利用します。
SnapMirrorの転送先FSxN(以降FSxN 2)のStorage Efficiency、ボリューム、aggregateの情報は以下のとおりです。
FSxN 2
::*> aggr show-efficiency -instance
Name of the Aggregate: aggr1
Node where Aggregate Resides: FsxId05f23d527aa7ad7a7-01
Logical Size Used by Volumes, Clones, Snapshot Copies in the Aggregate: 136KB
Total Physical Used: 288KB
Total Storage Efficiency Ratio: 1.00:1
Total Data Reduction Logical Used Without Snapshots: 136KB
Total Data Reduction Physical Used Without Snapshots: 288KB
Total Data Reduction Efficiency Ratio Without Snapshots: 1.00:1
Total Data Reduction Logical Used without snapshots and flexclones: 136KB
Total Data Reduction Physical Used without snapshots and flexclones: 288KB
Total Data Reduction Efficiency Ratio without snapshots and flexclones: 1.00:1
Total Logical Size Used by Volumes, Clones, Snapshot Copies in the FabricPool Performance Tier: 616KB
Total Physical Used in FabricPool Performance Tier: 2.64MB
Total FabricPool Performance Tier Storage Efficiency Ratio: 1.00:1
Total Data Reduction Logical Used without snapshots and flexclones in the FabricPool Performance Tier: 616KB
Total Data Reduction Physical Used without snapshots and flexclones in the FabricPool Performance Tier: 2.64MB
Total FabricPool Performance Tier Data Reduction Efficiency Ratio without snapshots and flexclones: 1.00:1
Logical Space Used for All Volumes: 136KB
Physical Space Used for All Volumes: 136KB
Space Saved by Volume Deduplication: 0B
Space Saved by Volume Deduplication and pattern detection: 0B
Volume Deduplication Savings ratio: 1.00:1
Space Saved by Volume Compression: 0B
Volume Compression Savings ratio: 1.00:1
Space Saved by Inline Zero Pattern Detection: 0B
Volume Data Reduction SE Ratio: 1.00:1
Logical Space Used by the Aggregate: 288KB
Physical Space Used by the Aggregate: 288KB
Space Saved by Aggregate Data Reduction: 0B
Aggregate Data Reduction SE Ratio: 1.00:1
Logical Size Used by Snapshot Copies: 0B
Physical Size Used by Snapshot Copies: 0B
Snapshot Volume Data Reduction Ratio: 1.00:1
Logical Size Used by FlexClone Volumes: 0B
Physical Sized Used by FlexClone Volumes: 0B
FlexClone Volume Data Reduction Ratio: 1.00:1
Snapshot And FlexClone Volume Data Reduction SE Ratio: 1.00:1
Number of Volumes Offline: 0
Number of SIS Disabled Volumes: 1
Number of SIS Change Log Disabled Volumes: 1
::*> aggr show -fields availsize, usedsize, size, physical-used, physical-used-percent, data-compaction-space-saved, data-compaction-space-saved-percent, data-compacted-count, composite-capacity-tier-used, sis-space-saved, sis-space-saved-percent, sis-shared-count, inactive-data-reporting-start-timestamp
aggregate availsize size usedsize physical-used physical-used-percent data-compaction-space-saved data-compaction-space-saved-percent data-compacted-count composite-capacity-tier-used sis-space-saved sis-space-saved-percent sis-shared-count inactive-data-reporting-start-timestamp
--------- --------- ------- -------- ------------- --------------------- --------------------------- ----------------------------------- -------------------- ---------------------------- --------------- ----------------------- ---------------- ---------------------------------------
aggr1 860.6GB 861.8GB 1.12GB 21.32MB 0% 0B 0% 0B 0B 0B 0% 0B -
::*> aggr show-space
Aggregate : aggr1
Performance Tier
Feature Used Used%
-------------------------------- ---------- ------
Volume Footprints 1.12GB 0%
Aggregate Metadata 1.98MB 0%
Snapshot Reserve 45.36GB 5%
Total Used 46.47GB 5%
Total Physical Used 21.32MB 0%
Total Provisioned Space 65GB 7%
Aggregate : aggr1
Object Store: FSxFabricpoolObjectStore
Feature Used Used%
-------------------------------- ---------- ------
Logical Used 0B -
Logical Referenced Capacity 0B -
Logical Unreferenced Capacity 0B -
Total Physical Used 0B -
2 entries were displayed.クラスターピアリングの作成
まず、クラスターピアリングをします。
その前にFSxNファイルシステムのLIFのIPアドレスを確認します。
FSxN 1
::*> cluster identity show
Cluster UUID: 52caefe1-b747-11ee-be16-5542f946a54e
Cluster Name: FsxId012f5aba611482f32
Cluster Serial Number: 1-80-000011
Cluster Location:
Cluster Contact:
RDB UUID: 52cb835d-b747-11ee-be16-5542f946a54e
::*> network interface show -service-policy default-intercluster
Logical Status Network Current Current Is
Vserver Interface Admin/Oper Address/Mask Node Port Home
----------- ---------- ---------- ------------------ ------------- ------- ----
FsxId012f5aba611482f32
inter_1 up/up 10.0.8.36/24 FsxId012f5aba611482f32-01
e0e true
inter_2 up/up 10.0.8.230/24 FsxId012f5aba611482f32-02
e0e true
2 entries were displayed.FSxN 2
::*> cluster identity show
Cluster UUID: 89fa46a2-b750-11ee-b8c0-db82abb5ccf5
Cluster Name: FsxId05f23d527aa7ad7a7
Cluster Serial Number: 1-80-000011
Cluster Location:
Cluster Contact:
RDB UUID: 89fae596-b750-11ee-b8c0-db82abb5ccf5
7::*> network interface show -service-policy default-intercluster
Logical Status Network Current Current Is
Vserver Interface Admin/Oper Address/Mask Node Port Home
----------- ---------- ---------- ------------------ ------------- ------- ----
FsxId05f23d527aa7ad7a7
inter_1 up/up 10.0.8.179/24 FsxId05f23d527aa7ad7a7-01
e0e true
inter_2 up/up 10.0.8.95/24 FsxId05f23d527aa7ad7a7-02
e0e true
2 entries were displayed.FSxN 2からクラスターピアリングを作成します。
FSxN 2
::*> cluster peer create -peer-addrs 10.0.8.36 10.0.8.230
Notice: Use a generated passphrase or choose a passphrase of 8 or more characters. To ensure the authenticity of the peering relationship, use a phrase or sequence of
characters that would be hard to guess.
Enter the passphrase:
Confirm the passphrase:
Notice: Now use the same passphrase in the "cluster peer create" command in the other cluster.FSxN 1からもクラスターピアリングを作成します。
FSxN 1
::*> cluster peer create -peer-addrs 10.0.8.179 10.0.8.95
Notice: Use a generated passphrase or choose a passphrase of 8 or more characters. To ensure the authenticity of the peering relationship, use a phrase or sequence of
characters that would be hard to guess.
Enter the passphrase:
Confirm the passphrase:
::*> cluster peer show
Peer Cluster Name Cluster Serial Number Availability Authentication
------------------------- --------------------- -------------- --------------
FsxId05f23d527aa7ad7a7 1-80-000011 Available okクラスターピアリングできましたね。
SVMピアリングの作成
続いて、SVMピアリングを行います。
FSxN 1からSVMピアリングを作成します。
FSxN 1
::*> vserver peer create -vserver svm -peer-vserver svm2 -applications snapmirror -peer-cluster FsxId05f23d527aa7ad7a7
Info: [Job 45] 'vserver peer create' job queuedFSxN 2側でSVMピアリングを承認します。
FSxN 2
::*> vserver peer show-all
Peer Peer Peering Remote
Vserver Vserver State Peer Cluster Applications Vserver
----------- ----------- ------------ ----------------- -------------- ---------
svm2 svm pending FsxId012f5aba611482f32
snapmirror svm
::*> vserver peer accept -vserver svm2 -peer-vserver svm
Info: [Job 45] 'vserver peer accept' job queued
::*> vserver peer show-all
Peer Peer Peering Remote
Vserver Vserver State Peer Cluster Applications Vserver
----------- ----------- ------------ ----------------- -------------- ---------
svm2 svm peered FsxId012f5aba611482f32
snapmirror svmSnapMirrorの初期転送
SnapMirrorの初期転送を行います。
転送後の物理使用量を確認したいため、転送先のボリュームのTiering Policy Noneにしておきます。
FSxN 2
::*> snapmirror protect -path-list svm:vol1 -destination-vserver svm2 -policy MirrorAllSnapshots -auto-initialize true -support-tiering true -tiering-policy none
[Job 46] Job is queued: snapmirror protect for list of source endpoints beginning with "svm:vol1".
::*> snapmirror show
Progress
Source Destination Mirror Relationship Total Last
Path Type Path State Status Progress Healthy Updated
----------- ---- ------------ ------- -------------- --------- ------- --------
svm:vol1 XDP svm2:vol1_dst
Uninitialized
Transferring 0B true 01/20 05:16:48
::*> snapmirror show
Progress
Source Destination Mirror Relationship Total Last
Path Type Path State Status Progress Healthy Updated
----------- ---- ------------ ------- -------------- --------- ------- --------
svm:vol1 XDP svm2:vol1_dst
Uninitialized
Transferring 5.01GB true 01/20 05:17:43
::*> snapmirror show
Progress
Source Destination Mirror Relationship Total Last
Path Type Path State Status Progress Healthy Updated
----------- ---- ------------ ------- -------------- --------- ------- --------
svm:vol1 XDP svm2:vol1_dst
Uninitialized
Transferring 6.27GB true 01/20 05:17:59
::*> snapmirror show
Progress
Source Destination Mirror Relationship Total Last
Path Type Path State Status Progress Healthy Updated
----------- ---- ------------ ------- -------------- --------- ------- --------
svm:vol1 XDP svm2:vol1_dst
Uninitialized
Finalizing 9.36GB true 01/20 05:18:46
::*> snapmirror show
Progress
Source Destination Mirror Relationship Total Last
Path Type Path State Status Progress Healthy Updated
----------- ---- ------------ ------- -------------- --------- ------- --------
svm:vol1 XDP svm2:vol1_dst
Snapmirrored
Idle - true -
::*> snapmirror show -instance
Source Path: svm:vol1
Source Cluster: -
Source Vserver: svm
Source Volume: vol1
Destination Path: svm2:vol1_dst
Destination Cluster: -
Destination Vserver: svm2
Destination Volume: vol1_dst
Relationship Type: XDP
Relationship Group Type: none
Managing Vserver: svm2
SnapMirror Schedule: -
SnapMirror Policy Type: async-mirror
SnapMirror Policy: MirrorAllSnapshots
Tries Limit: -
Throttle (KB/sec): unlimited
Consistency Group Item Mappings: -
Current Transfer Throttle (KB/sec): -
Mirror State: Snapmirrored
Relationship Status: Idle
File Restore File Count: -
File Restore File List: -
Transfer Snapshot: -
Snapshot Progress: -
Total Progress: -
Network Compression Ratio: -
Snapshot Checkpoint: -
Newest Snapshot: snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_051647
Newest Snapshot Timestamp: 01/20 05:16:48
Exported Snapshot: snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_051647
Exported Snapshot Timestamp: 01/20 05:16:48
Healthy: true
Relationship ID: 1c2fbc48-b753-11ee-9c61-cd186ff61130
Source Vserver UUID: 95c966c9-b748-11ee-be16-5542f946a54e
Destination Vserver UUID: a809406f-b751-11ee-b8c0-db82abb5ccf5
Current Operation ID: -
Transfer Type: -
Transfer Error: -
Last Transfer Type: update
Last Transfer Error: -
Last Transfer Error Codes: -
Last Transfer Size: 0B
Last Transfer Network Compression Ratio: 1:1
Last Transfer Duration: 0:0:0
Last Transfer From: svm:vol1
Last Transfer End Timestamp: 01/20 05:18:57
Unhealthy Reason: -
Progress Last Updated: -
Relationship Capability: 8.2 and above
Lag Time: 0:2:31
Current Transfer Priority: -
SMTape Operation: -
Destination Volume Node Name: FsxId05f23d527aa7ad7a7-01
Identity Preserve Vserver DR: -
Number of Successful Updates: 1
Number of Failed Updates: 0
Number of Successful Resyncs: 0
Number of Failed Resyncs: 0
Number of Successful Breaks: 0
Number of Failed Breaks: 0
Total Transfer Bytes: 10053200014
Total Transfer Time in Seconds: 130
Source Volume MSIDs Preserved: -
OpMask: ffffffffffffffff
Is Auto Expand Enabled: -
Percent Complete for Current Status: -9.36GBでFinalizingされています。
初期転送完了後のFSxN 2のStorage Efficiency、ボリューム、aggregate、Snapshotの情報は以下のとおりです。
FSxN 2
::*> volume efficiency show -volume vol1_dst -fields state, policy, storage-efficiency-mode, inline-compression, inline-dedupe, compression, data-compaction, auto-adaptive-compression-savings, auto-adaptive-compression-existing-volume, using-auto-adaptive-compression
vserver volume state policy compression inline-compression storage-efficiency-mode inline-dedupe data-compaction auto-adaptive-compression-savings using-auto-adaptive-compression auto-adaptive-compression-existing-volume
------- -------- -------- ------ ----------- ------------------ ----------------------- ------------- --------------- --------------------------------- ------------------------------- -----------------------------------------
svm2 vol1_dst Disabled - false true efficient false true true true false
::*> volume efficiency show -volume vol1_dst -fields changelog-usage, changelog-size, logical-data-size, state, progress, last-op-size, last-op-begin, last-op-end
vserver volume state progress last-op-begin last-op-end last-op-size changelog-usage changelog-size logical-data-size
------- -------- -------- ----------------- ------------- ------------------------ ------------ --------------- -------------- -----------------
svm2 vol1_dst Disabled Idle for 00:00:00 - Sat Jan 20 05:19:56 2024 0B 0% 0B 0B
::*> volume show -volume vol1_dst -fields available, filesystem-size, total, used, percent-used, performance-tier-inactive-user-data, performance-tier-inactive-user-data-percent, size, dedupe-space-saved, dedupe-space-saved-percent, dedupe-space-shared,logical-used, logical-used-percent,logical-used-by-afs, logical-available,physical-used, physical-used-percent
vserver volume size available filesystem-size total used percent-used dedupe-space-saved dedupe-space-saved-percent dedupe-space-shared physical-used physical-used-percent logical-used logical-used-percent logical-available logical-used-by-afs performance-tier-inactive-user-data performance-tier-inactive-user-data-percent
------- -------- ------- --------- --------------- ------- ------- ------------ ------------------ -------------------------- ------------------- ------------- --------------------- ------------ -------------------- ----------------- ------------------- ----------------------------------- -------------------------------------------
svm2 vol1_dst 57.65GB 6.35GB 57.65GB 54.77GB 48.42GB 88% 0B 0% 48GB 48.74GB 85% 48.42GB 88% - 48.42GB 0B 0%
::*> volume show-footprint -volume vol1_dst
Vserver : svm2
Volume : vol1_dst
Feature Used Used%
-------------------------------- ---------- -----
Volume Data Footprint 48.74GB 5%
Footprint in Performance Tier 48.84GB 100%
Footprint in FSxFabricpoolObjectStore 0B 0%
Volume Guarantee 0B 0%
Flexible Volume Metadata 324.4MB 0%
Delayed Frees 106.3MB 0%
File Operation Metadata 4KB 0%
Total Footprint 49.16GB 5%
Effective Total Footprint 49.16GB 5%
::*> aggr show-efficiency -instance
Name of the Aggregate: aggr1
Node where Aggregate Resides: FsxId05f23d527aa7ad7a7-01
Logical Size Used by Volumes, Clones, Snapshot Copies in the Aggregate: 97.12GB
Total Physical Used: 9.38GB
Total Storage Efficiency Ratio: 10.35:1
Total Data Reduction Logical Used Without Snapshots: 48.38GB
Total Data Reduction Physical Used Without Snapshots: 9.32GB
Total Data Reduction Efficiency Ratio Without Snapshots: 5.19:1
Total Data Reduction Logical Used without snapshots and flexclones: 48.38GB
Total Data Reduction Physical Used without snapshots and flexclones: 9.32GB
Total Data Reduction Efficiency Ratio without snapshots and flexclones: 5.19:1
Total Logical Size Used by Volumes, Clones, Snapshot Copies in the FabricPool Performance Tier: 97.16GB
Total Physical Used in FabricPool Performance Tier: 9.53GB
Total FabricPool Performance Tier Storage Efficiency Ratio: 10.19:1
Total Data Reduction Logical Used without snapshots and flexclones in the FabricPool Performance Tier: 48.42GB
Total Data Reduction Physical Used without snapshots and flexclones in the FabricPool Performance Tier: 9.47GB
Total FabricPool Performance Tier Data Reduction Efficiency Ratio without snapshots and flexclones: 5.11:1
Logical Space Used for All Volumes: 48.38GB
Physical Space Used for All Volumes: 48.38GB
Space Saved by Volume Deduplication: 0B
Space Saved by Volume Deduplication and pattern detection: 0B
Volume Deduplication Savings ratio: 1.00:1
Space Saved by Volume Compression: 0B
Volume Compression Savings ratio: 1.00:1
Space Saved by Inline Zero Pattern Detection: 0B
Volume Data Reduction SE Ratio: 1.00:1
Logical Space Used by the Aggregate: 48.88GB
Physical Space Used by the Aggregate: 9.38GB
Space Saved by Aggregate Data Reduction: 39.50GB
Aggregate Data Reduction SE Ratio: 5.21:1
Logical Size Used by Snapshot Copies: 48.74GB
Physical Size Used by Snapshot Copies: 327.2MB
Snapshot Volume Data Reduction Ratio: 152.54:1
Logical Size Used by FlexClone Volumes: 0B
Physical Sized Used by FlexClone Volumes: 0B
FlexClone Volume Data Reduction Ratio: 1.00:1
Snapshot And FlexClone Volume Data Reduction SE Ratio: 152.54:1
Number of Volumes Offline: 0
Number of SIS Disabled Volumes: 1
Number of SIS Change Log Disabled Volumes: 2
::*> aggr show -fields availsize, usedsize, size, physical-used, physical-used-percent, data-compaction-space-saved, data-compaction-space-saved-percent, data-compacted-count, composite-capacity-tier-used, sis-space-saved, sis-space-saved-percent, sis-shared-count, inactive-data-reporting-start-timestamp
aggregate availsize size usedsize physical-used physical-used-percent data-compaction-space-saved data-compaction-space-saved-percent data-compacted-count composite-capacity-tier-used sis-space-saved sis-space-saved-percent sis-shared-count inactive-data-reporting-start-timestamp
--------- --------- ------- -------- ------------- --------------------- --------------------------- ----------------------------------- -------------------- ---------------------------- --------------- ----------------------- ---------------- ---------------------------------------
aggr1 850.8GB 861.8GB 10.92GB 9.58GB 1% 39.50GB 78% 1.76GB 0B 39.50GB 78% 1.76GB -
::*> aggr show-space
Aggregate : aggr1
Performance Tier
Feature Used Used%
-------------------------------- ---------- ------
Volume Footprints 50.28GB 6%
Aggregate Metadata 138.6MB 0%
Snapshot Reserve 45.36GB 5%
Total Used 56.27GB 6%
Total Physical Used 9.58GB 1%
Total Provisioned Space 122.7GB 14%
Aggregate : aggr1
Object Store: FSxFabricpoolObjectStore
Feature Used Used%
-------------------------------- ---------- ------
Logical Used 0B -
Logical Referenced Capacity 0B -
Logical Unreferenced Capacity 0B -
Total Physical Used 0B -
2 entries were displayed.
::*> snapshot show -volume vol1_dst
---Blocks---
Vserver Volume Snapshot Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
svm2 vol1_dst
snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_051647
327.2MB 1% 1%
::*> snapshot show -volume vol1_dst -instance
Vserver: svm2
Volume: vol1_dst
Snapshot: snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_051647
Snapshot Data Set ID: 4294968323
Snapshot Master Data Set ID: 6457977134
Creation Time: Sat Jan 20 05:16:48 2024
Snapshot Busy: true
List of Owners: snapmirror
Snapshot Size: 327.2MB
Percentage of Total Blocks: 1%
Percentage of Used Blocks: 1%
Consistency Point Count: 155
Comment: -
File System Version: 9.13
File System Block Format: 64-bit
Physical Snap ID: 1
Logical Snap ID: 1
Database Record Owner: -
Snapshot Tags: SMCreated=snapmirror,
SMDeleteMe=snapmirror
Instance UUID: 966e20c5-eee1-456f-bdbd-e3f44f1761c1
Version UUID: 06ad125a-3a96-432a-ab53-b190bce521c1
7-Mode Snapshot: false
Label for SnapMirror Operations: -
Snapshot State: -
Constituent Snapshot: false
Node: FsxId05f23d527aa7ad7a7-01
AFS Size from Snapshot: 48.74GB
Compression Savings from Snapshot: 0B
Dedup Savings from Snapshot: 0B
VBN Zero Savings from Snapshot: 0B
Reserved (holes and overwrites) in Snapshot: 0B
Snapshot Logical Used: 48.74GB
Performance Metadata from Snapshot: 1.87MB
Snapshot Inofile Version: 4
Expiry Time: -
Compression Type: none
SnapLock Expiry Time: -
Application IO Size: -
Is Qtree Caching Support Enabled: false
Compression Algorithm: lzopro
Snapshot Created for Conversion: falseSnapshotの論理データサイズが48.74GBのところaggr show-efficiencyのTotal Physical Usedが9.38GBであることから、Inactive data compressionのデータ削減効果を維持した状態でSnapMirrorで転送できることが分かります。
転送元にファイルを追加
SnapMirrorの初期転送で転送されたデータサイズはsnapmirror showでは確認できません。
せっかくなので、SnapMirrorの差分転送を行いsnapmirror showからもInactive data compressionのデータ削減効果を維持した状態でSnapMirrorで転送できることを確認します。
下準備としてSnapMirrorの転送元に48GiBのファイルを追加します。
$ yes \
$(base64 /dev/urandom -w 0 \
| head -c 1K
) \
| tr -d '\n' \
| sudo dd of=/mnt/fsxn/vol1/1KB_random_pattern_text_block_48GiB_2 bs=4M count=12288 iflag=fullblock
12288+0 records in
12288+0 records out
51539607552 bytes (52 GB, 48 GiB) copied, 351.968 s, 146 MB/s
$ ls -l /mnt/fsxn/vol1
total 101059616
-rw-r--r--. 1 root root 51539607552 Jan 20 04:38 1KB_random_pattern_text_block_48GiB
-rw-r--r--. 1 root root 51539607552 Jan 20 05:29 1KB_random_pattern_text_block_48GiB_2
$ df -hT -t nfs4
Filesystem Type Size Used Avail Use% Mounted on
svm-0a7c58a5f3a47283c.fs-012f5aba611482f32.fsx.us-east-1.amazonaws.com:/vol1 nfs4 122G 97G 25G 80% /mnt/fsxn/vol1ファイル追加後のFSxN 1のStorage Efficiency、ボリューム、aggregate、Snapshotの情報は以下のとおりです。
FSxN 2
::*> volume efficiency show -volume vol1 -fields changelog-usage, changelog-size, logical-data-size, state, progress, last-op-size, last-op-begin, last-op-end
vserver volume state progress last-op-begin last-op-end last-op-size changelog-usage changelog-size logical-data-size
------- ------ ------- ------------------ ------------------------ ------------------------ ------------ --------------- -------------- -----------------
svm vol1 Enabled 24768 KB (0%) Done Sat Jan 20 04:02:39 2024 Sat Jan 20 04:02:39 2024 0B 26% 480.0MB 96.89GB
::*> volume show -volume vol1 -fields available, filesystem-size, total, used, percent-used, performance-tier-inactive-user-data, performance-tier-inactive-user-data-percent, size, dedupe-space-saved, dedupe-space-saved-percent, dedupe-space-shared,logical-used, logical-used-percent,logical-used-by-afs, logical-available, physical-used, physical-used-percent
vserver volume size available filesystem-size total used percent-used dedupe-space-saved dedupe-space-saved-percent dedupe-space-shared physical-used physical-used-percent logical-used logical-used-percent logical-available logical-used-by-afs performance-tier-inactive-user-data performance-tier-inactive-user-data-percent
------- ------ ----- --------- --------------- ------- ------- ------------ ------------------ -------------------------- ------------------- ------------- --------------------- ------------ -------------------- ----------------- ------------------- ----------------------------------- -------------------------------------------
svm vol1 128GB 24.73GB 128GB 121.6GB 96.87GB 79% 24.22MB 0% 4KB 96.86GB 76% 96.89GB 80% - 96.89GB 0B 0%
::*> volume show-footprint -volume vol1
Vserver : svm
Volume : vol1
Feature Used Used%
-------------------------------- ---------- -----
Volume Data Footprint 96.86GB 11%
Footprint in Performance Tier 97.11GB 100%
Footprint in FSxFabricpoolObjectStore 0B 0%
Volume Guarantee 0B 0%
Flexible Volume Metadata 644.8MB 0%
Deduplication Metadata 107.5MB 0%
Temporary Deduplication 107.5MB 0%
Delayed Frees 255.8MB 0%
File Operation Metadata 4KB 0%
Total Footprint 97.85GB 11%
Footprint Data Reduction 93.01GB 10%
Auto Adaptive Compression 93.01GB 10%
Effective Total Footprint 4.83GB 1%
::*> aggr show-efficiency -instance
Name of the Aggregate: aggr1
Node where Aggregate Resides: FsxId012f5aba611482f32-01
Logical Size Used by Volumes, Clones, Snapshot Copies in the Aggregate: 144.3GB
Total Physical Used: 54.37GB
Total Storage Efficiency Ratio: 2.65:1
Total Data Reduction Logical Used Without Snapshots: 96.05GB
Total Data Reduction Physical Used Without Snapshots: 54.37GB
Total Data Reduction Efficiency Ratio Without Snapshots: 1.77:1
Total Data Reduction Logical Used without snapshots and flexclones: 96.05GB
Total Data Reduction Physical Used without snapshots and flexclones: 54.37GB
Total Data Reduction Efficiency Ratio without snapshots and flexclones: 1.77:1
Total Logical Size Used by Volumes, Clones, Snapshot Copies in the FabricPool Performance Tier: 145.1GB
Total Physical Used in FabricPool Performance Tier: 55.48GB
Total FabricPool Performance Tier Storage Efficiency Ratio: 2.62:1
Total Data Reduction Logical Used without snapshots and flexclones in the FabricPool Performance Tier: 96.89GB
Total Data Reduction Physical Used without snapshots and flexclones in the FabricPool Performance Tier: 55.48GB
Total FabricPool Performance Tier Data Reduction Efficiency Ratio without snapshots and flexclones: 1.75:1
Logical Space Used for All Volumes: 96.05GB
Physical Space Used for All Volumes: 96.03GB
Space Saved by Volume Deduplication: 24.22MB
Space Saved by Volume Deduplication and pattern detection: 24.22MB
Volume Deduplication Savings ratio: 1.00:1
Space Saved by Volume Compression: 0B
Volume Compression Savings ratio: 1.00:1
Space Saved by Inline Zero Pattern Detection: 0B
Volume Data Reduction SE Ratio: 1.00:1
Logical Space Used by the Aggregate: 100.3GB
Physical Space Used by the Aggregate: 54.37GB
Space Saved by Aggregate Data Reduction: 45.94GB
Aggregate Data Reduction SE Ratio: 1.85:1
Logical Size Used by Snapshot Copies: 48.21GB
Physical Size Used by Snapshot Copies: 476KB
Snapshot Volume Data Reduction Ratio: 106202.52:1
Logical Size Used by FlexClone Volumes: 0B
Physical Sized Used by FlexClone Volumes: 0B
FlexClone Volume Data Reduction Ratio: 1.00:1
Snapshot And FlexClone Volume Data Reduction SE Ratio: 106202.52:1
Number of Volumes Offline: 0
Number of SIS Disabled Volumes: 1
Number of SIS Change Log Disabled Volumes: 0
::*> aggr show -fields availsize, usedsize, size, physical-used, physical-used-percent, data-compaction-space-saved, data-compaction-space-saved-percent, data-compacted-count, composite-capacity-tier-used, sis-space-saved, sis-space-saved-percent, sis-shared-count, inactive-data-reporting-start-timestamp
aggregate availsize size usedsize physical-used physical-used-percent data-compaction-space-saved data-compaction-space-saved-percent data-compacted-count composite-capacity-tier-used sis-space-saved sis-space-saved-percent sis-shared-count inactive-data-reporting-start-timestamp
--------- --------- ------- -------- ------------- --------------------- --------------------------- ----------------------------------- -------------------- ---------------------------- --------------- ----------------------- ---------------- ---------------------------------------
aggr1 798.4GB 861.8GB 63.34GB 62.02GB 7% 45.94GB 42% 2.05GB 0B 45.94GB 42% 2.05GB -
::*> aggr show-space
Aggregate : aggr1
Performance Tier
Feature Used Used%
-------------------------------- ---------- ------
Volume Footprints 98.86GB 11%
Aggregate Metadata 10.42GB 1%
Snapshot Reserve 45.36GB 5%
Total Used 108.7GB 12%
Total Physical Used 62.02GB 7%
Total Provisioned Space 129GB 14%
Aggregate : aggr1
Object Store: FSxFabricpoolObjectStore
Feature Used Used%
-------------------------------- ---------- ------
Logical Used 0B -
Logical Referenced Capacity 0B -
Logical Unreferenced Capacity 0B -
Total Physical Used 0B -
2 entries were displayed.
::*> snapshot show -volume vol1
---Blocks---
Vserver Volume Snapshot Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
svm vol1
snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_051647
204KB 0% 0%48GiBと大きめなファイルを作成したため、ポストプロセス重複排除(Storage Efficiency)が実行されていますね。
Storage Efficiencyを停止します。
FSxN 1
::*> volume efficiency stop -volume vol1
The efficiency operation for volume "vol1" of Vserver "svm" is being stopped.Storage Efficiency停止後のFSxN 2のStorage Efficiency、ボリューム、aggregate、Snapshotの情報は以下のとおりです。
FSxN 2
::*> volume efficiency show -volume vol1 -fields changelog-usage, changelog-size, logical-data-size, state, progress, last-op-size, last-op-begin, last-op-end
vserver volume state progress last-op-begin last-op-end last-op-size changelog-usage changelog-size logical-data-size
------- ------ ------- ----------------- ------------------------ ------------------------ ------------ --------------- -------------- -----------------
svm vol1 Enabled Idle for 00:00:37 Sat Jan 20 05:25:41 2024 Sat Jan 20 05:34:41 2024 0B 26% 480MB 96.89GB
::*> volume show -volume vol1 -fields available, filesystem-size, total, used, percent-used, performance-tier-inactive-user-data, performance-tier-inactive-user-data-percent, size, dedupe-space-saved, dedupe-space-saved-percent, dedupe-space-shared,logical-used, logical-used-percent,logical-used-by-afs, logical-available, physical-used, physical-used-percent
vserver volume size available filesystem-size total used percent-used dedupe-space-saved dedupe-space-saved-percent dedupe-space-shared physical-used physical-used-percent logical-used logical-used-percent logical-available logical-used-by-afs performance-tier-inactive-user-data performance-tier-inactive-user-data-percent
------- ------ ----- --------- --------------- ------- ------- ------------ ------------------ -------------------------- ------------------- ------------- --------------------- ------------ -------------------- ----------------- ------------------- ----------------------------------- -------------------------------------------
svm vol1 128GB 24.84GB 128GB 121.6GB 96.76GB 79% 126.4MB 0% 4KB 96.76GB 76% 96.89GB 80% - 96.89GB 0B 0%
::*> volume show-footprint -volume vol1
Vserver : svm
Volume : vol1
Feature Used Used%
-------------------------------- ---------- -----
Volume Data Footprint 96.76GB 11%
Footprint in Performance Tier 97.12GB 100%
Footprint in FSxFabricpoolObjectStore 0B 0%
Volume Guarantee 0B 0%
Flexible Volume Metadata 644.8MB 0%
Deduplication Metadata 107.5MB 0%
Temporary Deduplication 107.5MB 0%
Delayed Frees 363.7MB 0%
File Operation Metadata 4KB 0%
Total Footprint 97.85GB 11%
Footprint Data Reduction 93.02GB 10%
Auto Adaptive Compression 93.02GB 10%
Effective Total Footprint 4.83GB 1%
::*> aggr show-efficiency -instance
Name of the Aggregate: aggr1
Node where Aggregate Resides: FsxId012f5aba611482f32-01
Logical Size Used by Volumes, Clones, Snapshot Copies in the Aggregate: 144.3GB
Total Physical Used: 54.19GB
Total Storage Efficiency Ratio: 2.66:1
Total Data Reduction Logical Used Without Snapshots: 96.05GB
Total Data Reduction Physical Used Without Snapshots: 54.18GB
Total Data Reduction Efficiency Ratio Without Snapshots: 1.77:1
Total Data Reduction Logical Used without snapshots and flexclones: 96.05GB
Total Data Reduction Physical Used without snapshots and flexclones: 54.18GB
Total Data Reduction Efficiency Ratio without snapshots and flexclones: 1.77:1
Total Logical Size Used by Volumes, Clones, Snapshot Copies in the FabricPool Performance Tier: 145.1GB
Total Physical Used in FabricPool Performance Tier: 55.30GB
Total FabricPool Performance Tier Storage Efficiency Ratio: 2.62:1
Total Data Reduction Logical Used without snapshots and flexclones in the FabricPool Performance Tier: 96.89GB
Total Data Reduction Physical Used without snapshots and flexclones in the FabricPool Performance Tier: 55.29GB
Total FabricPool Performance Tier Data Reduction Efficiency Ratio without snapshots and flexclones: 1.75:1
Logical Space Used for All Volumes: 96.05GB
Physical Space Used for All Volumes: 95.93GB
Space Saved by Volume Deduplication: 126.4MB
Space Saved by Volume Deduplication and pattern detection: 126.4MB
Volume Deduplication Savings ratio: 1.00:1
Space Saved by Volume Compression: 0B
Volume Compression Savings ratio: 1.00:1
Space Saved by Inline Zero Pattern Detection: 0B
Volume Data Reduction SE Ratio: 1.00:1
Logical Space Used by the Aggregate: 100.1GB
Physical Space Used by the Aggregate: 54.19GB
Space Saved by Aggregate Data Reduction: 45.94GB
Aggregate Data Reduction SE Ratio: 1.85:1
Logical Size Used by Snapshot Copies: 48.21GB
Physical Size Used by Snapshot Copies: 480KB
Snapshot Volume Data Reduction Ratio: 105317.50:1
Logical Size Used by FlexClone Volumes: 0B
Physical Sized Used by FlexClone Volumes: 0B
FlexClone Volume Data Reduction Ratio: 1.00:1
Snapshot And FlexClone Volume Data Reduction SE Ratio: 105317.50:1
Number of Volumes Offline: 0
Number of SIS Disabled Volumes: 1
Number of SIS Change Log Disabled Volumes: 0
::*> aggr show -fields availsize, usedsize, size, physical-used, physical-used-percent, data-compaction-space-saved, data-compaction-space-saved-percent, data-compacted-count, composite-capacity-tier-used, sis-space-saved, sis-space-saved-percent, sis-shared-count, inactive-data-reporting-start-timestamp
aggregate availsize size usedsize physical-used physical-used-percent data-compaction-space-saved data-compaction-space-saved-percent data-compacted-count composite-capacity-tier-used sis-space-saved sis-space-saved-percent sis-shared-count inactive-data-reporting-start-timestamp
--------- --------- ------- -------- ------------- --------------------- --------------------------- ----------------------------------- -------------------- ---------------------------- --------------- ----------------------- ---------------- ---------------------------------------
aggr1 798.4GB 861.8GB 63.36GB 61.91GB 7% 45.94GB 42% 2.05GB 0B 45.94GB 42% 2.05GB -
::*> aggr show-space
Aggregate : aggr1
Performance Tier
Feature Used Used%
-------------------------------- ---------- ------
Volume Footprints 98.86GB 11%
Aggregate Metadata 10.44GB 1%
Snapshot Reserve 45.36GB 5%
Total Used 108.7GB 12%
Total Physical Used 61.91GB 7%
Total Provisioned Space 129GB 14%
Aggregate : aggr1
Object Store: FSxFabricpoolObjectStore
Feature Used Used%
-------------------------------- ---------- ------
Logical Used 0B -
Logical Referenced Capacity 0B -
Logical Unreferenced Capacity 0B -
Total Physical Used 0B -
2 entries were displayed.
::*> snapshot show -volume vol1
---Blocks---
Vserver Volume Snapshot Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
svm vol1
snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_051647
208KB 0% 0%重複排除で126.4MB削減されたようです。あまり大きな影響ではないので、このまま検証を進めます。
転送元でInactive data compressionを実行
転送元でInactive data compressionを実行します。
「Snapshot取得後にInactive data compressionを実行したデータをSnapMirrorした場合も圧縮効果を維持できるか」という観点も確認したいので、Snapshotを事前に取得します。
「Snapshot取得後にInactive data compressionを実行しても物理使用量が減少するのか」については以下記事で検証しています。
FSxN 1
::*> snapshot create -vserver svm -volume vol1 -snapshot test.2024-01-20_0537 -snapmirror-label test
::*> snapshot show -volume vol1
---Blocks---
Vserver Volume Snapshot Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
svm vol1
snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_051647
212KB 0% 0%
test.2024-01-20_0537 160KB 0% 0%
2 entries were displayed.Inactive data compressionを実行します。
FSxN 1
::*> volume efficiency inactive-data-compression start -volume vol1 -inactive-days 0
Inactive data compression scan started on volume "vol1" in Vserver "svm"
::*> volume efficiency inactive-data-compression show -instance
Volume: vol1
Vserver: svm
Is Enabled: true
Scan Mode: default
Progress: RUNNING
Status: SUCCESS
Compression Algorithm: lzopro
Failure Reason: -
Total Blocks: -
Total blocks Processed: -
Percentage: 0%
Phase1 L1s Processed: 7922
Phase1 Lns Skipped:
L1: 0
L2: 0
L3: 0
L4: 0
L5: 0
L6: 0
L7: 0
Phase2 Total Blocks: 0
Phase2 Blocks Processed: 0
Number of Cold Blocks Encountered: 602800
Number of Repacked Blocks: 0
Number of Compression Done Blocks: 597336
Number of Vol-Overwrites: 0
Time since Last Inactive Data Compression Scan started(sec): 3082
Time since Last Inactive Data Compression Scan ended(sec): 3069
Time since Last Successful Inactive Data Compression Scan started(sec): -
Time since Last Successful Inactive Data Compression Scan ended(sec): 3069
Average time for Cold Data Compression(sec): 13
Tuning Enabled: true
Threshold: 14
Threshold Upper Limit: 21
Threshold Lower Limit: 14
Client Read history window: 14
Incompressible Data Percentage: 0%
::*> volume efficiency inactive-data-compression show -instance
Volume: vol1
Vserver: svm
Is Enabled: true
Scan Mode: default
Progress: RUNNING
Status: SUCCESS
Compression Algorithm: lzopro
Failure Reason: -
Total Blocks: -
Total blocks Processed: -
Percentage: 91%
Phase1 L1s Processed: 89876
Phase1 Lns Skipped:
L1: 0
L2: 0
L3: 0
L4: 0
L5: 0
L6: 0
L7: 0
Phase2 Total Blocks: 33013824
Phase2 Blocks Processed: 30185472
Number of Cold Blocks Encountered: 12600336
Number of Repacked Blocks: 0
Number of Compression Done Blocks: 12560240
Number of Vol-Overwrites: 0
Time since Last Inactive Data Compression Scan started(sec): 3268
Time since Last Inactive Data Compression Scan ended(sec): 3255
Time since Last Successful Inactive Data Compression Scan started(sec): -
Time since Last Successful Inactive Data Compression Scan ended(sec): 3255
Average time for Cold Data Compression(sec): 13
Tuning Enabled: true
Threshold: 14
Threshold Upper Limit: 21
Threshold Lower Limit: 14
Client Read history window: 14
Incompressible Data Percentage: 0%
::*> volume efficiency inactive-data-compression show -instance
Volume: vol1
Vserver: svm
Is Enabled: true
Scan Mode: -
Progress: IDLE
Status: SUCCESS
Compression Algorithm: lzopro
Failure Reason: -
Total Blocks: -
Total blocks Processed: -
Percentage: -
Phase1 L1s Processed: -
Phase1 Lns Skipped: -
Phase2 Total Blocks: -
Phase2 Blocks Processed: -
Number of Cold Blocks Encountered: 12600336
Number of Repacked Blocks: 0
Number of Compression Done Blocks: 12560240
Number of Vol-Overwrites: 0
Time since Last Inactive Data Compression Scan started(sec): 14
Time since Last Inactive Data Compression Scan ended(sec): 4
Time since Last Successful Inactive Data Compression Scan started(sec): -
Time since Last Successful Inactive Data Compression Scan ended(sec): 4
Average time for Cold Data Compression(sec): 12
Tuning Enabled: true
Threshold: 14
Threshold Upper Limit: 21
Threshold Lower Limit: 14
Client Read history window: 14
Incompressible Data Percentage: 0%Inactive data compression実行後のFSxN 1のStorage Efficiency、ボリューム、aggregate、Snapshotの情報は以下のとおりです。
FSxN 1
::*> volume efficiency show -volume vol1 -fields changelog-usage, changelog-size, logical-data-size, state, progress, last-op-size, last-op-begin, last-op-end
vserver volume state progress last-op-begin last-op-end last-op-size changelog-usage changelog-size logical-data-size
------- ------ ------- ----------------- ------------------------ ------------------------ ------------ --------------- -------------- -----------------
svm vol1 Enabled Idle for 00:08:00 Sat Jan 20 05:25:41 2024 Sat Jan 20 05:34:41 2024 0B 26% 480MB 96.89GB
::*> volume show -volume vol1 -fields available, filesystem-size, total, used, percent-used, performance-tier-inactive-user-data, performance-tier-inactive-user-data-percent, size, dedupe-space-saved, dedupe-space-saved-percent, dedupe-space-shared,logical-used, logical-used-percent,logical-used-by-afs, logical-available, physical-used, physical-used-percent
vserver volume size available filesystem-size total used percent-used dedupe-space-saved dedupe-space-saved-percent dedupe-space-shared physical-used physical-used-percent logical-used logical-used-percent logical-available logical-used-by-afs performance-tier-inactive-user-data performance-tier-inactive-user-data-percent
------- ------ ----- --------- --------------- ------- ------- ------------ ------------------ -------------------------- ------------------- ------------- --------------------- ------------ -------------------- ----------------- ------------------- ----------------------------------- -------------------------------------------
svm vol1 128GB 24.83GB 128GB 121.6GB 96.77GB 79% 126.4MB 0% 4KB 97.02GB 76% 96.89GB 80% - 96.89GB 0B 0%
::*> volume show-footprint -volume vol1
Vserver : svm
Volume : vol1
Feature Used Used%
-------------------------------- ---------- -----
Volume Data Footprint 97.02GB 11%
Footprint in Performance Tier 97.40GB 100%
Footprint in FSxFabricpoolObjectStore 0B 0%
Volume Guarantee 0B 0%
Flexible Volume Metadata 644.8MB 0%
Deduplication Metadata 107.5MB 0%
Temporary Deduplication 107.5MB 0%
Delayed Frees 390.4MB 0%
File Operation Metadata 4KB 0%
Total Footprint 98.13GB 11%
Footprint Data Reduction 93.18GB 10%
Auto Adaptive Compression 93.18GB 10%
Effective Total Footprint 4.96GB 1%
::*> aggr show-efficiency -instance
Name of the Aggregate: aggr1
Node where Aggregate Resides: FsxId012f5aba611482f32-01
Logical Size Used by Volumes, Clones, Snapshot Copies in the Aggregate: 240.7GB
Total Physical Used: 13.27GB
Total Storage Efficiency Ratio: 18.15:1
Total Data Reduction Logical Used Without Snapshots: 95.61GB
Total Data Reduction Physical Used Without Snapshots: 13.23GB
Total Data Reduction Efficiency Ratio Without Snapshots: 7.22:1
Total Data Reduction Logical Used without snapshots and flexclones: 95.61GB
Total Data Reduction Physical Used without snapshots and flexclones: 13.23GB
Total Data Reduction Efficiency Ratio without snapshots and flexclones: 7.22:1
Total Logical Size Used by Volumes, Clones, Snapshot Copies in the FabricPool Performance Tier: 242.0GB
Total Physical Used in FabricPool Performance Tier: 14.83GB
Total FabricPool Performance Tier Storage Efficiency Ratio: 16.32:1
Total Data Reduction Logical Used without snapshots and flexclones in the FabricPool Performance Tier: 96.89GB
Total Data Reduction Physical Used without snapshots and flexclones in the FabricPool Performance Tier: 14.79GB
Total FabricPool Performance Tier Data Reduction Efficiency Ratio without snapshots and flexclones: 6.55:1
Logical Space Used for All Volumes: 95.61GB
Physical Space Used for All Volumes: 95.49GB
Space Saved by Volume Deduplication: 126.4MB
Space Saved by Volume Deduplication and pattern detection: 126.4MB
Volume Deduplication Savings ratio: 1.00:1
Space Saved by Volume Compression: 0B
Volume Compression Savings ratio: 1.00:1
Space Saved by Inline Zero Pattern Detection: 0B
Volume Data Reduction SE Ratio: 1.00:1
Logical Space Used by the Aggregate: 105.0GB
Physical Space Used by the Aggregate: 13.27GB
Space Saved by Aggregate Data Reduction: 91.77GB
Aggregate Data Reduction SE Ratio: 7.92:1
Logical Size Used by Snapshot Copies: 145.1GB
Physical Size Used by Snapshot Copies: 256.2MB
Snapshot Volume Data Reduction Ratio: 579.97:1
Logical Size Used by FlexClone Volumes: 0B
Physical Sized Used by FlexClone Volumes: 0B
FlexClone Volume Data Reduction Ratio: 1.00:1
Snapshot And FlexClone Volume Data Reduction SE Ratio: 579.97:1
Number of Volumes Offline: 0
Number of SIS Disabled Volumes: 1
Number of SIS Change Log Disabled Volumes: 0
::*> aggr show -fields availsize, usedsize, size, physical-used, physical-used-percent, data-compaction-space-saved, data-compaction-space-saved-percent, data-compacted-count, composite-capacity-tier-used, sis-space-saved, sis-space-saved-percent, sis-shared-count, inactive-data-reporting-start-timestamp
aggregate availsize size usedsize physical-used physical-used-percent data-compaction-space-saved data-compaction-space-saved-percent data-compacted-count composite-capacity-tier-used sis-space-saved sis-space-saved-percent sis-shared-count inactive-data-reporting-start-timestamp
--------- --------- ------- -------- ------------- --------------------- --------------------------- ----------------------------------- -------------------- ---------------------------- --------------- ----------------------- ---------------- ---------------------------------------
aggr1 843.7GB 861.8GB 18.08GB 16.64GB 2% 91.77GB 84% 4.09GB 0B 91.77GB 84% 4.09GB -
::*> aggr show-space
Aggregate : aggr1
Performance Tier
Feature Used Used%
-------------------------------- ---------- ------
Volume Footprints 99.14GB 11%
Aggregate Metadata 10.71GB 1%
Snapshot Reserve 45.36GB 5%
Total Used 63.44GB 7%
Total Physical Used 16.64GB 2%
Total Provisioned Space 129GB 14%
Aggregate : aggr1
Object Store: FSxFabricpoolObjectStore
Feature Used Used%
-------------------------------- ---------- ------
Logical Used 0B -
Logical Referenced Capacity 0B -
Logical Unreferenced Capacity 0B -
Total Physical Used 0B -
2 entries were displayed.
::*> snapshot show -volume vol1
---Blocks---
Vserver Volume Snapshot Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
svm vol1
snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_051647
212KB 0% 0%
test.2024-01-20_0537 255.7MB 0% 0%
2 entries were displayed.Total Physical Usedが13.27GBであることから圧縮がしっかり効いていそうです。
もう一度Inactive data compressionを実行した場合、スキャン済みのデータブロックを再度スキャンしてしまうのか気になったので試してみます。
FSxN 1
::*> volume efficiency inactive-data-compression start -volume vol1 -inactive-days 0
Inactive data compression scan started on volume "vol1" in Vserver "svm"
::*> volume efficiency inactive-data-compression show -instance
Volume: vol1
Vserver: svm
Is Enabled: true
Scan Mode: default
Progress: RUNNING
Status: SUCCESS
Compression Algorithm: lzopro
Failure Reason: -
Total Blocks: -
Total blocks Processed: -
Percentage: 0%
Phase1 L1s Processed: 21583
Phase1 Lns Skipped:
L1: 7317
L2: 0
L3: 0
L4: 0
L5: 0
L6: 0
L7: 0
Phase2 Total Blocks: 0
Phase2 Blocks Processed: 0
Number of Cold Blocks Encountered: 7056
Number of Repacked Blocks: 0
Number of Compression Done Blocks: 4696
Number of Vol-Overwrites: 0
Time since Last Inactive Data Compression Scan started(sec): 609
Time since Last Inactive Data Compression Scan ended(sec): 599
Time since Last Successful Inactive Data Compression Scan started(sec): -
Time since Last Successful Inactive Data Compression Scan ended(sec): 599
Average time for Cold Data Compression(sec): 12
Tuning Enabled: true
Threshold: 14
Threshold Upper Limit: 21
Threshold Lower Limit: 14
Client Read history window: 14
Incompressible Data Percentage: 0%
::*> volume efficiency inactive-data-compression show -instance
Volume: vol1
Vserver: svm
Is Enabled: true
Scan Mode: default
Progress: RUNNING
Status: SUCCESS
Compression Algorithm: lzopro
Failure Reason: -
Total Blocks: -
Total blocks Processed: -
Percentage: 0%
Phase1 L1s Processed: 60771
Phase1 Lns Skipped:
L1: 12789
L2: 0
L3: 0
L4: 0
L5: 0
L6: 0
L7: 0
Phase2 Total Blocks: 0
Phase2 Blocks Processed: 0
Number of Cold Blocks Encountered: 7056
Number of Repacked Blocks: 0
Number of Compression Done Blocks: 4696
Number of Vol-Overwrites: 0
Time since Last Inactive Data Compression Scan started(sec): 621
Time since Last Inactive Data Compression Scan ended(sec): 610
Time since Last Successful Inactive Data Compression Scan started(sec): -
Time since Last Successful Inactive Data Compression Scan ended(sec): 610
Average time for Cold Data Compression(sec): 12
Tuning Enabled: true
Threshold: 14
Threshold Upper Limit: 21
Threshold Lower Limit: 14
Client Read history window: 14
Incompressible Data Percentage: 0%
::*> volume efficiency inactive-data-compression show -instance
Volume: vol1
Vserver: svm
Is Enabled: true
Scan Mode: -
Progress: IDLE
Status: SUCCESS
Compression Algorithm: lzopro
Failure Reason: -
Total Blocks: -
Total blocks Processed: -
Percentage: -
Phase1 L1s Processed: -
Phase1 Lns Skipped: -
Phase2 Total Blocks: -
Phase2 Blocks Processed: -
Number of Cold Blocks Encountered: 7056
Number of Repacked Blocks: 0
Number of Compression Done Blocks: 4696
Number of Vol-Overwrites: 0
Time since Last Inactive Data Compression Scan started(sec): 629
Time since Last Inactive Data Compression Scan ended(sec): 618
Time since Last Successful Inactive Data Compression Scan started(sec): -
Time since Last Successful Inactive Data Compression Scan ended(sec): 618
Average time for Cold Data Compression(sec): 12
Tuning Enabled: true
Threshold: 14
Threshold Upper Limit: 21
Threshold Lower Limit: 14
Client Read history window: 14
Incompressible Data Percentage: 0%Number of Cold Blocks Encounteredが7,056と最初にInactive data compressionを実行した時と比べてスキャンしたブロック数が圧倒的に少ないです。
もう一度試します。
FSxN 1
::*> volume efficiency inactive-data-compression start -volume vol1 -inactive-days 0
Inactive data compression scan started on volume "vol1" in Vserver "svm"
::*> volume efficiency inactive-data-compression show -instance
Volume: vol1
Vserver: svm
Is Enabled: true
Scan Mode: default
Progress: RUNNING
Status: SUCCESS
Compression Algorithm: lzopro
Failure Reason: -
Total Blocks: -
Total blocks Processed: -
Percentage: 22%
Phase1 L1s Processed: 37096
Phase1 Lns Skipped:
L1: 61594
L2: 0
L3: 0
L4: 0
L5: 0
L6: 0
L7: 0
Phase2 Total Blocks: 33013824
Phase2 Blocks Processed: 7376587
Number of Cold Blocks Encountered: 1920
Number of Repacked Blocks: 0
Number of Compression Done Blocks: 0
Number of Vol-Overwrites: 0
Time since Last Inactive Data Compression Scan started(sec): 113
Time since Last Inactive Data Compression Scan ended(sec): 103
Time since Last Successful Inactive Data Compression Scan started(sec): -
Time since Last Successful Inactive Data Compression Scan ended(sec): 103
Average time for Cold Data Compression(sec): 11
Tuning Enabled: true
Threshold: 14
Threshold Upper Limit: 21
Threshold Lower Limit: 14
Client Read history window: 14
Incompressible Data Percentage: 0%
::*> volume efficiency inactive-data-compression show -instance
Volume: vol1
Vserver: svm
Is Enabled: true
Scan Mode: -
Progress: IDLE
Status: SUCCESS
Compression Algorithm: lzopro
Failure Reason: -
Total Blocks: -
Total blocks Processed: -
Percentage: -
Phase1 L1s Processed: -
Phase1 Lns Skipped: -
Phase2 Total Blocks: -
Phase2 Blocks Processed: -
Number of Cold Blocks Encountered: 2344
Number of Repacked Blocks: 0
Number of Compression Done Blocks: 0
Number of Vol-Overwrites: 0
Time since Last Inactive Data Compression Scan started(sec): 13
Time since Last Inactive Data Compression Scan ended(sec): 3
Time since Last Successful Inactive Data Compression Scan started(sec): -
Time since Last Successful Inactive Data Compression Scan ended(sec): 3
Average time for Cold Data Compression(sec): 11
Tuning Enabled: true
Threshold: 14
Threshold Upper Limit: 21
Threshold Lower Limit: 14
Client Read history window: 14
Incompressible Data Percentage: 0%Number of Cold Blocks Encounteredは2,344です。
また、最初にInactive data compressionを実行した際のNumber of Cold Blocks EncounteredとNumber of Compression Done Blocksの差は40,096です。そして、その次に実行した際のNumber of Cold Blocks Encounteredは7,056です。つまりは再実行時に圧縮されなかったデータブロックを再度スキャンするという挙動ではないことが分かります。
まとめると「Inactive data compressionでスキャン済みのデータは、Inactive data compression再実行時に再スキャンされない」ということになります。
CloudWatchメトリクスからもStorage Efficiencyによるデータ削減量StorageEfficiencySavingsとSSDとキャパシティプールストレージの物理データ使用量であるStorageUsedなどの値を確認します。
Inactive data compressionを実行したタイミングでストレージの物理データ使用量が減っています。
参考までにFSxN 1のStorage Efficiency、ボリューム、aggregate、Snapshotの情報は以下のとおりです。特に面白い動きはありませんでした。
FSxN 1
::*> volume efficiency show -volume vol1 -fields changelog-usage, changelog-size, logical-data-size, state, progress, last-op-size, last-op-begin, last-op-end
vserver volume state progress last-op-begin last-op-end last-op-size changelog-usage changelog-size logical-data-size
------- ------ ------- ----------------- ------------------------ ------------------------ ------------ --------------- -------------- -----------------
svm vol1 Enabled Idle for 00:21:34 Sat Jan 20 05:25:41 2024 Sat Jan 20 05:34:41 2024 0B 26% 480MB 96.89GB
::*> volume show -volume vol1 -fields available, filesystem-size, total, used, percent-used, performance-tier-inactive-user-data, performance-tier-inactive-user-data-percent, size, dedupe-space-saved, dedupe-space-saved-percent, dedupe-space-shared,logical-used, logical-used-percent,logical-used-by-afs, logical-available, physical-used, physical-used-percent
vserver volume size available filesystem-size total used percent-used dedupe-space-saved dedupe-space-saved-percent dedupe-space-shared physical-used physical-used-percent logical-used logical-used-percent logical-available logical-used-by-afs performance-tier-inactive-user-data performance-tier-inactive-user-data-percent
------- ------ ----- --------- --------------- ------- ------- ------------ ------------------ -------------------------- ------------------- ------------- --------------------- ------------ -------------------- ----------------- ------------------- ----------------------------------- -------------------------------------------
svm vol1 128GB 24.83GB 128GB 121.6GB 96.77GB 79% 126.4MB 0% 4KB 97.07GB 76% 96.89GB 80% - 96.89GB 0B 0%
::*> volume show-footprint -volume vol1
Vserver : svm
Volume : vol1
Feature Used Used%
-------------------------------- ---------- -----
Volume Data Footprint 97.07GB 11%
Footprint in Performance Tier 97.54GB 100%
Footprint in FSxFabricpoolObjectStore 0B 0%
Volume Guarantee 0B 0%
Flexible Volume Metadata 644.8MB 0%
Deduplication Metadata 107.5MB 0%
Temporary Deduplication 107.5MB 0%
Delayed Frees 483.3MB 0%
File Operation Metadata 4KB 0%
Total Footprint 98.28GB 11%
Footprint Data Reduction 93.32GB 10%
Auto Adaptive Compression 93.32GB 10%
Effective Total Footprint 4.96GB 1%
::*> aggr show-efficiency -instance
Name of the Aggregate: aggr1
Node where Aggregate Resides: FsxId012f5aba611482f32-01
Logical Size Used by Volumes, Clones, Snapshot Copies in the Aggregate: 240.6GB
Total Physical Used: 13.17GB
Total Storage Efficiency Ratio: 18.26:1
Total Data Reduction Logical Used Without Snapshots: 95.47GB
Total Data Reduction Physical Used Without Snapshots: 13.14GB
Total Data Reduction Efficiency Ratio Without Snapshots: 7.27:1
Total Data Reduction Logical Used without snapshots and flexclones: 95.47GB
Total Data Reduction Physical Used without snapshots and flexclones: 13.14GB
Total Data Reduction Efficiency Ratio without snapshots and flexclones: 7.27:1
Total Logical Size Used by Volumes, Clones, Snapshot Copies in the FabricPool Performance Tier: 242.0GB
Total Physical Used in FabricPool Performance Tier: 14.88GB
Total FabricPool Performance Tier Storage Efficiency Ratio: 16.26:1
Total Data Reduction Logical Used without snapshots and flexclones in the FabricPool Performance Tier: 96.89GB
Total Data Reduction Physical Used without snapshots and flexclones in the FabricPool Performance Tier: 14.84GB
Total FabricPool Performance Tier Data Reduction Efficiency Ratio without snapshots and flexclones: 6.53:1
Logical Space Used for All Volumes: 95.47GB
Physical Space Used for All Volumes: 95.35GB
Space Saved by Volume Deduplication: 126.4MB
Space Saved by Volume Deduplication and pattern detection: 126.4MB
Volume Deduplication Savings ratio: 1.00:1
Space Saved by Volume Compression: 0B
Volume Compression Savings ratio: 1.00:1
Space Saved by Inline Zero Pattern Detection: 0B
Volume Data Reduction SE Ratio: 1.00:1
Logical Space Used by the Aggregate: 105.0GB
Physical Space Used by the Aggregate: 13.17GB
Space Saved by Aggregate Data Reduction: 91.78GB
Aggregate Data Reduction SE Ratio: 7.97:1
Logical Size Used by Snapshot Copies: 145.1GB
Physical Size Used by Snapshot Copies: 310.8MB
Snapshot Volume Data Reduction Ratio: 477.99:1
Logical Size Used by FlexClone Volumes: 0B
Physical Sized Used by FlexClone Volumes: 0B
FlexClone Volume Data Reduction Ratio: 1.00:1
Snapshot And FlexClone Volume Data Reduction SE Ratio: 477.99:1
Number of Volumes Offline: 0
Number of SIS Disabled Volumes: 1
Number of SIS Change Log Disabled Volumes: 0
::*> aggr show -fields availsize, usedsize, size, physical-used, physical-used-percent, data-compaction-space-saved, data-compaction-space-saved-percent, data-compacted-count, composite-capacity-tier-used, sis-space-saved, sis-space-saved-percent, sis-shared-count, inactive-data-reporting-start-timestamp
aggregate availsize size usedsize physical-used physical-used-percent data-compaction-space-saved data-compaction-space-saved-percent data-compacted-count composite-capacity-tier-used sis-space-saved sis-space-saved-percent sis-shared-count inactive-data-reporting-start-timestamp
--------- --------- ------- -------- ------------- --------------------- --------------------------- ----------------------------------- -------------------- ---------------------------- --------------- ----------------------- ---------------- ---------------------------------------
aggr1 843.7GB 861.8GB 18.08GB 16.69GB 2% 91.78GB 84% 4.09GB 0B 91.78GB 84% 4.09GB -
::*> aggr show-space
Aggregate : aggr1
Performance Tier
Feature Used Used%
-------------------------------- ---------- ------
Volume Footprints 99.29GB 11%
Aggregate Metadata 10.56GB 1%
Snapshot Reserve 45.36GB 5%
Total Used 63.43GB 7%
Total Physical Used 16.69GB 2%
Total Provisioned Space 129GB 14%
Aggregate : aggr1
Object Store: FSxFabricpoolObjectStore
Feature Used Used%
-------------------------------- ---------- ------
Logical Used 0B -
Logical Referenced Capacity 0B -
Logical Unreferenced Capacity 0B -
Total Physical Used 0B -
2 entries were displayed.
::*> snapshot show -volume vol1
---Blocks---
Vserver Volume Snapshot Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
svm vol1
snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_051647
212KB 0% 0%
test.2024-01-20_0537 310.4MB 0% 0%
2 entries were displayed.SnapMirrorの差分転送
SnapMirrorの差分転送を行います。
FSxN 2
::*> snapmirror update -destination-path svm2:vol1_dst
Operation is queued: snapmirror update of destination "svm2:vol1_dst".
::*> snapmirror show -fields source-path, destination-path, state, status, progress-last-updated, total-progress
source-path destination-path state status total-progress progress-last-updated
----------- ---------------- ------------ ------------ -------------- ---------------------
svm:vol1 svm2:vol1_dst Snapmirrored Transferring 0B 01/20 05:59:02
::*> snapmirror show -fields source-path, destination-path, state, status, progress-last-updated, total-progress
source-path destination-path state status total-progress progress-last-updated
----------- ---------------- ------------ ------------ -------------- ---------------------
svm:vol1 svm2:vol1_dst Snapmirrored Transferring 9.35GB 01/20 06:01:18
::*> snapmirror show -fields source-path, destination-path, state, status, progress-last-updated, total-progress
source-path destination-path state status total-progress progress-last-updated
----------- ---------------- ------------ ------ -------------- ---------------------
svm:vol1 svm2:vol1_dst Snapmirrored Idle - -
::*> snapmirror show -destination-path svm2:vol1_dst
Source Path: svm:vol1
Source Cluster: -
Source Vserver: svm
Source Volume: vol1
Destination Path: svm2:vol1_dst
Destination Cluster: -
Destination Vserver: svm2
Destination Volume: vol1_dst
Relationship Type: XDP
Relationship Group Type: none
Managing Vserver: svm2
SnapMirror Schedule: -
SnapMirror Policy Type: async-mirror
SnapMirror Policy: MirrorAllSnapshots
Tries Limit: -
Throttle (KB/sec): unlimited
Consistency Group Item Mappings: -
Current Transfer Throttle (KB/sec): -
Mirror State: Snapmirrored
Relationship Status: Idle
File Restore File Count: -
File Restore File List: -
Transfer Snapshot: -
Snapshot Progress: -
Total Progress: -
Network Compression Ratio: -
Snapshot Checkpoint: -
Newest Snapshot: snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_055902
Newest Snapshot Timestamp: 01/20 05:59:02
Exported Snapshot: snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_055902
Exported Snapshot Timestamp: 01/20 05:59:02
Healthy: true
Relationship ID: 1c2fbc48-b753-11ee-9c61-cd186ff61130
Source Vserver UUID: 95c966c9-b748-11ee-be16-5542f946a54e
Destination Vserver UUID: a809406f-b751-11ee-b8c0-db82abb5ccf5
Current Operation ID: -
Transfer Type: -
Transfer Error: -
Last Transfer Type: update
Last Transfer Error: -
Last Transfer Error Codes: -
Last Transfer Size: 9.35GB
Last Transfer Network Compression Ratio: 1:1
Last Transfer Duration: 0:2:21
Last Transfer From: svm:vol1
Last Transfer End Timestamp: 01/20 06:01:23
Unhealthy Reason: -
Progress Last Updated: -
Relationship Capability: 8.2 and above
Lag Time: 0:2:58
Current Transfer Priority: -
SMTape Operation: -
Destination Volume Node Name: FsxId05f23d527aa7ad7a7-01
Identity Preserve Vserver DR: -
Number of Successful Updates: 2
Number of Failed Updates: 0
Number of Successful Resyncs: 0
Number of Failed Resyncs: 0
Number of Successful Breaks: 0
Number of Failed Breaks: 0
Total Transfer Bytes: 20095218242
Total Transfer Time in Seconds: 271
Source Volume MSIDs Preserved: -
OpMask: ffffffffffffffff
Is Auto Expand Enabled: -
Percent Complete for Current Status: -Last Transfer Sizeが9.35GBになっています。snapmirror showからでもInactive data compressionのデータ削減効果を維持した状態でSnapMirrorで転送していることを確認できました。
差分転送後のFSxN 2のStorage Efficiency、ボリューム、aggregate、Snapshotの情報は以下のとおりです。
FSxN 2
::*> volume efficiency inactive-data-compression show -volume vol1_dst -instance
Volume: vol1_dst
Vserver: svm2
Is Enabled: true
Scan Mode: -
Progress: IDLE
Status: SUCCESS
Compression Algorithm: lzopro
Failure Reason: -
Total Blocks: -
Total blocks Processed: -
Percentage: -
Phase1 L1s Processed: -
Phase1 Lns Skipped: -
Phase2 Total Blocks: -
Phase2 Blocks Processed: -
Number of Cold Blocks Encountered: 0
Number of Repacked Blocks: 0
Number of Compression Done Blocks: 0
Number of Vol-Overwrites: 0
Time since Last Inactive Data Compression Scan started(sec): 0
Time since Last Inactive Data Compression Scan ended(sec): 0
Time since Last Successful Inactive Data Compression Scan started(sec): -
Time since Last Successful Inactive Data Compression Scan ended(sec): 0
Average time for Cold Data Compression(sec): 0
Tuning Enabled: true
Threshold: 14
Threshold Upper Limit: 21
Threshold Lower Limit: 14
Client Read history window: 14
Incompressible Data Percentage: 0%
::*> volume efficiency show -volume vol1_dst -fields changelog-usage, changelog-size, logical-data-size, state, progress, last-op-size, last-op-begin, last-op-end
vserver volume state progress last-op-begin last-op-end last-op-size changelog-usage changelog-size logical-data-size
------- -------- -------- ----------------- ------------- ------------------------ ------------ --------------- -------------- -----------------
svm2 vol1_dst Disabled Idle for 00:00:00 - Sat Jan 20 06:02:47 2024 0B 0% 0B 0B
::*> volume show -volume vol1_dst -fields available, filesystem-size, total, used, percent-used, performance-tier-inactive-user-data, performance-tier-inactive-user-data-percent, size, dedupe-space-saved, dedupe-space-saved-percent, dedupe-space-shared,logical-used, logical-used-percent,logical-used-by-afs, logical-available,physical-used, physical-used-percent
vserver volume size available filesystem-size total used percent-used dedupe-space-saved dedupe-space-saved-percent dedupe-space-shared physical-used physical-used-percent logical-used logical-used-percent logical-available logical-used-by-afs performance-tier-inactive-user-data performance-tier-inactive-user-data-percent
------- -------- ------- --------- --------------- ------- ------- ------------ ------------------ -------------------------- ------------------- ------------- --------------------- ------------ -------------------- ----------------- ------------------- ----------------------------------- -------------------------------------------
svm2 vol1_dst 114.0GB 11.56GB 114.0GB 108.3GB 96.71GB 89% 126.4MB 0% 95.88GB 97.15GB 85% 96.71GB 89% - 96.71GB 0B 0%
::*> volume show-footprint -volume vol1_dst
Vserver : svm2
Volume : vol1_dst
Feature Used Used%
-------------------------------- ---------- -----
Volume Data Footprint 97.15GB 11%
Footprint in Performance Tier 97.36GB 100%
Footprint in FSxFabricpoolObjectStore 0B 0%
Volume Guarantee 0B 0%
Flexible Volume Metadata 580.0MB 0%
Delayed Frees 222.4MB 0%
File Operation Metadata 4KB 0%
Total Footprint 97.93GB 11%
Effective Total Footprint 97.93GB 11%
::*> aggr show-efficiency -instance
Name of the Aggregate: aggr1
Node where Aggregate Resides: FsxId05f23d527aa7ad7a7-01
Logical Size Used by Volumes, Clones, Snapshot Copies in the Aggregate: 339.0GB
Total Physical Used: 18.57GB
Total Storage Efficiency Ratio: 18.26:1
Total Data Reduction Logical Used Without Snapshots: 96.76GB
Total Data Reduction Physical Used Without Snapshots: 18.48GB
Total Data Reduction Efficiency Ratio Without Snapshots: 5.23:1
Total Data Reduction Logical Used without snapshots and flexclones: 96.76GB
Total Data Reduction Physical Used without snapshots and flexclones: 18.48GB
Total Data Reduction Efficiency Ratio without snapshots and flexclones: 5.23:1
Total Logical Size Used by Volumes, Clones, Snapshot Copies in the FabricPool Performance Tier: 339.1GB
Total Physical Used in FabricPool Performance Tier: 18.87GB
Total FabricPool Performance Tier Storage Efficiency Ratio: 17.97:1
Total Data Reduction Logical Used without snapshots and flexclones in the FabricPool Performance Tier: 96.84GB
Total Data Reduction Physical Used without snapshots and flexclones in the FabricPool Performance Tier: 18.78GB
Total FabricPool Performance Tier Data Reduction Efficiency Ratio without snapshots and flexclones: 5.16:1
Logical Space Used for All Volumes: 96.76GB
Physical Space Used for All Volumes: 96.63GB
Space Saved by Volume Deduplication: 126.4MB
Space Saved by Volume Deduplication and pattern detection: 126.4MB
Volume Deduplication Savings ratio: 1.00:1
Space Saved by Volume Compression: 0B
Volume Compression Savings ratio: 1.00:1
Space Saved by Inline Zero Pattern Detection: 0B
Volume Data Reduction SE Ratio: 1.00:1
Logical Space Used by the Aggregate: 97.47GB
Physical Space Used by the Aggregate: 18.57GB
Space Saved by Aggregate Data Reduction: 78.91GB
Aggregate Data Reduction SE Ratio: 5.25:1
Logical Size Used by Snapshot Copies: 242.3GB
Physical Size Used by Snapshot Copies: 444.4MB
Snapshot Volume Data Reduction Ratio: 558.25:1
Logical Size Used by FlexClone Volumes: 0B
Physical Sized Used by FlexClone Volumes: 0B
FlexClone Volume Data Reduction Ratio: 1.00:1
Snapshot And FlexClone Volume Data Reduction SE Ratio: 558.25:1
Number of Volumes Offline: 0
Number of SIS Disabled Volumes: 1
Number of SIS Change Log Disabled Volumes: 2
::*> aggr show -fields availsize, usedsize, size, physical-used, physical-used-percent, data-compaction-space-saved, data-compaction-space-saved-percent, data-compacted-count, composite-capacity-tier-used, sis-space-saved, sis-space-saved-percent, sis-shared-count, inactive-data-reporting-start-timestamp
aggregate availsize size usedsize physical-used physical-used-percent data-compaction-space-saved data-compaction-space-saved-percent data-compacted-count composite-capacity-tier-used sis-space-saved sis-space-saved-percent sis-shared-count inactive-data-reporting-start-timestamp
--------- --------- ------- -------- ------------- --------------------- --------------------------- ----------------------------------- -------------------- ---------------------------- --------------- ----------------------- ---------------- ---------------------------------------
aggr1 841.3GB 861.8GB 20.46GB 18.97GB 2% 78.91GB 79% 3.50GB 0B 78.91GB 79% 3.50GB -
::*> aggr show-space
Aggregate : aggr1
Performance Tier
Feature Used Used%
-------------------------------- ---------- ------
Volume Footprints 99.05GB 11%
Aggregate Metadata 329.3MB 0%
Snapshot Reserve 45.36GB 5%
Total Used 65.82GB 7%
Total Physical Used 18.97GB 2%
Total Provisioned Space 179.0GB 20%
Aggregate : aggr1
Object Store: FSxFabricpoolObjectStore
Feature Used Used%
-------------------------------- ---------- ------
Logical Used 0B -
Logical Referenced Capacity 0B -
Logical Unreferenced Capacity 0B -
Total Physical Used 0B -
2 entries were displayed.
::*> snapshot show -volume vol1_dst
---Blocks---
Vserver Volume Snapshot Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
svm2 vol1_dst
snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_051647
329.2MB 0% 0%
test.2024-01-20_0537 115.0MB 0% 0%
snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_055902
156KB 0% 0%
3 entries were displayed.dedupe-space-savedが126.4MBであることから重複排除が維持できていることが分かりますね。
転送先をTiering Policy Allに変更
SnapMirrorの転送先のボリュームのTiering PolicyをAllに変更します。
FSxN 2
::*> volume modify -vserver svm2 -volume vol1_dst -tiering-policy all
Volume modify successful on volume vol1_dst of Vserver svm2.
::*> volume show -volume vol1_dst -fields tiering-policy, cloud-retrieval-policy
vserver volume tiering-policy cloud-retrieval-policy
------- -------- -------------- ----------------------
svm2 vol1_dst all default
::*> volume show-footprint -volume vol1_dst
Vserver : svm2
Volume : vol1_dst
Feature Used Used%
-------------------------------- ---------- -----
Volume Data Footprint 97.15GB 11%
Footprint in Performance Tier 84.51GB 87%
Footprint in FSxFabricpoolObjectStore
12.86GB 13%
Volume Guarantee 0B 0%
Flexible Volume Metadata 580.0MB 0%
Delayed Frees 228.3MB 0%
File Operation Metadata 4KB 0%
Total Footprint 97.94GB 11%
Footprint Data Reduction in capacity tier 10.42GB -
Effective Total Footprint 87.52GB 10%
::*> volume show-footprint -volume vol1_dst
Vserver : svm2
Volume : vol1_dst
Feature Used Used%
-------------------------------- ---------- -----
Volume Data Footprint 97.15GB 11%
Footprint in Performance Tier 1.53GB 2%
Footprint in FSxFabricpoolObjectStore
95.88GB 98%
Volume Guarantee 0B 0%
Flexible Volume Metadata 580.0MB 0%
Delayed Frees 264.1MB 0%
File Operation Metadata 4KB 0%
Total Footprint 97.97GB 11%
Footprint Data Reduction in capacity tier 77.66GB -
Effective Total Footprint 20.31GB 2%95.88GBのデータが階層化されました。
階層化完了後のFSxN 2のStorage Efficiency、ボリューム、aggregate、Snapshotの情報は以下のとおりです。
FSxN 2
::*> volume efficiency show -volume vol1_dst -fields changelog-usage, changelog-size, logical-data-size, state, progress, last-op-size, last-op-begin, last-op-end
vserver volume state progress last-op-begin last-op-end last-op-size changelog-usage changelog-size logical-data-size
------- -------- -------- ----------------- ------------- ------------------------ ------------ --------------- -------------- -----------------
svm2 vol1_dst Disabled Idle for 00:00:00 - Sat Jan 20 06:19:28 2024 0B 0% 0B 0B
::*> volume show -volume vol1_dst -fields available, filesystem-size, total, used, percent-used, performance-tier-inactive-user-data, performance-tier-inactive-user-data-percent, size, dedupe-space-saved, dedupe-space-saved-percent, dedupe-space-shared,logical-used, logical-used-percent,logical-used-by-afs, logical-available,physical-used, physical-used-percent
vserver volume size available filesystem-size total used percent-used dedupe-space-saved dedupe-space-saved-percent dedupe-space-shared physical-used physical-used-percent logical-used logical-used-percent logical-available logical-used-by-afs performance-tier-inactive-user-data performance-tier-inactive-user-data-percent
------- -------- ------- --------- --------------- ------- ------- ------------ ------------------ -------------------------- ------------------- ------------- --------------------- ------------ -------------------- ----------------- ------------------- ----------------------------------- -------------------------------------------
svm2 vol1_dst 114.0GB 11.56GB 114.0GB 108.3GB 96.72GB 89% 126.4MB 0% 95.88GB 97.15GB 85% 96.72GB 89% - 96.72GB - -
::*> aggr show-efficiency -instance
Name of the Aggregate: aggr1
Node where Aggregate Resides: FsxId05f23d527aa7ad7a7-01
Logical Size Used by Volumes, Clones, Snapshot Copies in the Aggregate: 339.0GB
Total Physical Used: 17.81GB
Total Storage Efficiency Ratio: 19.04:1
Total Data Reduction Logical Used Without Snapshots: 96.76GB
Total Data Reduction Physical Used Without Snapshots: 17.51GB
Total Data Reduction Efficiency Ratio Without Snapshots: 5.53:1
Total Data Reduction Logical Used without snapshots and flexclones: 96.76GB
Total Data Reduction Physical Used without snapshots and flexclones: 17.51GB
Total Data Reduction Efficiency Ratio without snapshots and flexclones: 5.53:1
Total Logical Size Used by Volumes, Clones, Snapshot Copies in the FabricPool Performance Tier: 5.33GB
Total Physical Used in FabricPool Performance Tier: 188.6KB
Total FabricPool Performance Tier Storage Efficiency Ratio: 29641.38:1
Total Data Reduction Logical Used without snapshots and flexclones in the FabricPool Performance Tier: 1.52GB
Total Data Reduction Physical Used without snapshots and flexclones in the FabricPool Performance Tier: 188.6KB
Total FabricPool Performance Tier Data Reduction Efficiency Ratio without snapshots and flexclones: 8466.74:1
Logical Space Used for All Volumes: 96.76GB
Physical Space Used for All Volumes: 96.64GB
Space Saved by Volume Deduplication: 126.4MB
Space Saved by Volume Deduplication and pattern detection: 126.4MB
Volume Deduplication Savings ratio: 1.00:1
Space Saved by Volume Compression: 0B
Volume Compression Savings ratio: 1.00:1
Space Saved by Inline Zero Pattern Detection: 0B
Volume Data Reduction SE Ratio: 1.00:1
Logical Space Used by the Aggregate: 25.62GB
Physical Space Used by the Aggregate: 17.81GB
Space Saved by Aggregate Data Reduction: 7.81GB
Aggregate Data Reduction SE Ratio: 1.44:1
Logical Size Used by Snapshot Copies: 242.3GB
Physical Size Used by Snapshot Copies: 444.5MB
Snapshot Volume Data Reduction Ratio: 558.09:1
Logical Size Used by FlexClone Volumes: 0B
Physical Sized Used by FlexClone Volumes: 0B
FlexClone Volume Data Reduction Ratio: 1.00:1
Snapshot And FlexClone Volume Data Reduction SE Ratio: 558.09:1
Number of Volumes Offline: 0
Number of SIS Disabled Volumes: 1
Number of SIS Change Log Disabled Volumes: 2
::*> aggr show -fields availsize, usedsize, size, physical-used, physical-used-percent, data-compaction-space-saved, data-compaction-space-saved-percent, data-compacted-count, composite-capacity-tier-used, sis-space-saved, sis-space-saved-percent, sis-shared-count, inactive-data-reporting-start-timestamp
aggregate availsize size usedsize physical-used physical-used-percent data-compaction-space-saved data-compaction-space-saved-percent data-compacted-count composite-capacity-tier-used sis-space-saved sis-space-saved-percent sis-shared-count inactive-data-reporting-start-timestamp
--------- --------- ------- -------- ------------- --------------------- --------------------------- ----------------------------------- -------------------- ---------------------------- --------------- ----------------------- ---------------- ---------------------------------------
aggr1 858.0GB 861.8GB 3.75GB 4.33GB 0% 7.81GB 68% 351.8MB 17.80GB 7.81GB 68% 351.8MB -
::*> aggr show-space
Aggregate : aggr1
Performance Tier
Feature Used Used%
-------------------------------- ---------- ------
Volume Footprints 3.21GB 0%
Aggregate Metadata 8.35GB 1%
Snapshot Reserve 45.36GB 5%
Total Used 49.10GB 5%
Total Physical Used 4.33GB 0%
Total Provisioned Space 179.0GB 20%
Aggregate : aggr1
Object Store: FSxFabricpoolObjectStore
Feature Used Used%
-------------------------------- ---------- ------
Logical Used 96.72GB -
Logical Referenced Capacity 96.25GB -
Logical Unreferenced Capacity 477.0MB -
Space Saved by Storage Efficiency 78.92GB -
Total Physical Used 17.80GB -
2 entries were displayed.
::*> snapshot show -volume vol1_dst
---Blocks---
Vserver Volume Snapshot Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
svm2 vol1_dst
snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_051647
329.2MB 0% 0%
test.2024-01-20_0537 115.0MB 0% 0%
snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_055902
156KB 0% 0%
3 entries were displayed.SSDの物理使用量が4.33GBと大幅に減っていますね。キャパシティプールストレージ上のデータサイズは17.80GBのようです。
SSDへの書き戻し
それではSSDへの書き戻しを行います。
FSxN 2
::*> volume modify -vserver svm2 -volume vol1_dst -tiering-policy none -cloud-retrieval-policy promote
Warning: The "promote" cloud retrieve policy retrieves all of the cloud data for the specified volume. If the tiering policy is "snapshot-only" then only AFS data is
retrieved. If the tiering policy is "none" then all data is retrieved. Volume "vol1_dst" in Vserver "svm2" is on a FabricPool, and there are approximately
102946693120 bytes tiered to the cloud that will be retrieved. Cloud retrieval may take a significant amount of time, and may degrade performance during that time.
The cloud retrieve operation may also result in data charges by your object store provider.
Do you want to continue? {y|n}: y
Volume modify successful on volume vol1_dst of Vserver svm2.
::*> volume show-footprint -volume vol1_dst
Vserver : svm2
Volume : vol1_dst
Feature Used Used%
-------------------------------- ---------- -----
Volume Data Footprint 97.15GB 11%
Footprint in Performance Tier 1.93GB 2%
Footprint in FSxFabricpoolObjectStore
95.47GB 98%
Volume Guarantee 0B 0%
Flexible Volume Metadata 580.0MB 0%
Delayed Frees 264.8MB 0%
File Operation Metadata 4KB 0%
Total Footprint 97.97GB 11%
Footprint Data Reduction in capacity tier 77.33GB -
Effective Total Footprint 20.64GB 2%
::*> volume show-footprint -volume vol1_dst
Vserver : svm2
Volume : vol1_dst
Feature Used Used%
-------------------------------- ---------- -----
Volume Data Footprint 97.15GB 11%
Footprint in Performance Tier 9.02GB 9%
Footprint in FSxFabricpoolObjectStore
88.40GB 91%
Volume Guarantee 0B 0%
Flexible Volume Metadata 580.0MB 0%
Delayed Frees 276.5MB 0%
File Operation Metadata 4KB 0%
Total Footprint 97.99GB 11%
Footprint Data Reduction in capacity tier 71.60GB -
Effective Total Footprint 26.39GB 3%非常にゆっくりですが、徐々に描き戻されています。
SSDの書き戻しを開始してから3時間後のFSxN 2のStorage Efficiency、ボリューム、aggregateの情報は以下のとおりです。
FSxN 2
::*> volume efficiency show -volume vol1_dst -fields changelog-usage, changelog-size, logical-data-size, state, progress, last-op-size, last-op-begin, last-op-end
vserver volume state progress last-op-begin last-op-end last-op-size changelog-usage changelog-size logical-data-size
------- -------- -------- ----------------- ------------- ------------------------ ------------ --------------- -------------- -----------------
svm2 vol1_dst Disabled Idle for 00:00:00 - Sat Jan 20 10:44:59 2024 0B 0% 0B 0B
::*> volume show -volume vol1_dst -fields available, filesystem-size, total, used, percent-used, performance-tier-inactive-user-data, performance-tier-inactive-user-data-percent, size, dedupe-space-saved, dedupe-space-saved-percent, dedupe-space-shared,logical-used, logical-used-percent,logical-used-by-afs, logical-available,physical-used, physical-used-percent
vserver volume size available filesystem-size total used percent-used dedupe-space-saved dedupe-space-saved-percent dedupe-space-shared physical-used physical-used-percent logical-used logical-used-percent logical-available logical-used-by-afs performance-tier-inactive-user-data performance-tier-inactive-user-data-percent
------- -------- ------- --------- --------------- ------- ------- ------------ ------------------ -------------------------- ------------------- ------------- --------------------- ------------ -------------------- ----------------- ------------------- ----------------------------------- -------------------------------------------
svm2 vol1_dst 114.0GB 11.54GB 114.0GB 108.3GB 96.73GB 89% 126.4MB 0% 95.88GB 97.16GB 85% 96.73GB 89% - 96.73GB 0B 0%
::*> volume show-footprint -volume vol1_dst
Vserver : svm2
Volume : vol1_dst
Feature Used Used%
-------------------------------- ---------- -----
Volume Data Footprint 97.16GB 11%
Footprint in Performance Tier 38.96GB 40%
Footprint in FSxFabricpoolObjectStore
58.68GB 60%
Volume Guarantee 0B 0%
Flexible Volume Metadata 580.0MB 0%
Delayed Frees 487.9MB 0%
File Operation Metadata 4KB 0%
Total Footprint 98.21GB 11%
Footprint Data Reduction in capacity tier 47.53GB -
Effective Total Footprint 50.68GB 6%
::*> aggr show-efficiency -instance
Name of the Aggregate: aggr1
Node where Aggregate Resides: FsxId05f23d527aa7ad7a7-01
Logical Size Used by Volumes, Clones, Snapshot Copies in the Aggregate: 339.0GB
Total Physical Used: 45.29GB
Total Storage Efficiency Ratio: 7.49:1
Total Data Reduction Logical Used Without Snapshots: 96.77GB
Total Data Reduction Physical Used Without Snapshots: 44.91GB
Total Data Reduction Efficiency Ratio Without Snapshots: 2.16:1
Total Data Reduction Logical Used without snapshots and flexclones: 96.77GB
Total Data Reduction Physical Used without snapshots and flexclones: 44.91GB
Total Data Reduction Efficiency Ratio without snapshots and flexclones: 2.16:1
Total Logical Size Used by Volumes, Clones, Snapshot Copies in the FabricPool Performance Tier: 135.3GB
Total Physical Used in FabricPool Performance Tier: 33.36GB
Total FabricPool Performance Tier Storage Efficiency Ratio: 4.06:1
Total Data Reduction Logical Used without snapshots and flexclones in the FabricPool Performance Tier: 38.65GB
Total Data Reduction Physical Used without snapshots and flexclones in the FabricPool Performance Tier: 33.21GB
Total FabricPool Performance Tier Data Reduction Efficiency Ratio without snapshots and flexclones: 1.16:1
Logical Space Used for All Volumes: 96.77GB
Physical Space Used for All Volumes: 96.65GB
Space Saved by Volume Deduplication: 126.4MB
Space Saved by Volume Deduplication and pattern detection: 126.4MB
Volume Deduplication Savings ratio: 1.00:1
Space Saved by Volume Compression: 0B
Volume Compression Savings ratio: 1.00:1
Space Saved by Inline Zero Pattern Detection: 0B
Volume Data Reduction SE Ratio: 1.00:1
Logical Space Used by the Aggregate: 51.50GB
Physical Space Used by the Aggregate: 45.29GB
Space Saved by Aggregate Data Reduction: 6.21GB
Aggregate Data Reduction SE Ratio: 1.14:1
Logical Size Used by Snapshot Copies: 242.3GB
Physical Size Used by Snapshot Copies: 445.1MB
Snapshot Volume Data Reduction Ratio: 557.41:1
Logical Size Used by FlexClone Volumes: 0B
Physical Sized Used by FlexClone Volumes: 0B
FlexClone Volume Data Reduction Ratio: 1.00:1
Snapshot And FlexClone Volume Data Reduction SE Ratio: 557.41:1
Number of Volumes Offline: 0
Number of SIS Disabled Volumes: 1
Number of SIS Change Log Disabled Volumes: 2
::*> aggr show -fields availsize, usedsize, size, physical-used, physical-used-percent, data-compaction-space-saved, data-compaction-space-saved-percent, data-compacted-count, composite-capacity-tier-used, sis-space-saved, sis-space-saved-percent, sis-shared-count, inactive-data-reporting-start-timestamp
aggregate availsize size usedsize physical-used physical-used-percent data-compaction-space-saved data-compaction-space-saved-percent data-compacted-count composite-capacity-tier-used sis-space-saved sis-space-saved-percent sis-shared-count inactive-data-reporting-start-timestamp
--------- --------- ------- -------- ------------- --------------------- --------------------------- ----------------------------------- -------------------- ---------------------------- --------------- ----------------------- ---------------- ---------------------------------------
aggr1 820.5GB 861.8GB 41.25GB 42.62GB 5% 6.21GB 13% 279.7MB 12.16GB 6.21GB 13% 279.7MB -
::*> aggr show-space
Aggregate : aggr1
Performance Tier
Feature Used Used%
-------------------------------- ---------- ------
Volume Footprints 40.65GB 4%
Aggregate Metadata 6.82GB 1%
Snapshot Reserve 45.36GB 5%
Total Used 86.61GB 10%
Total Physical Used 42.62GB 5%
Total Provisioned Space 179.0GB 20%
Aggregate : aggr1
Object Store: FSxFabricpoolObjectStore
Feature Used Used%
-------------------------------- ---------- ------
Logical Used 66.12GB -
Logical Referenced Capacity 65.78GB -
Logical Unreferenced Capacity 351.7MB -
Space Saved by Storage Efficiency 53.96GB -
Total Physical Used 12.16GB -
2 entries were displayed.SSDの物理使用量は42.62GBとなりました。キャパシティプールストレージへ階層化を行う前よりも増えてしまっています。
CloudWatchメトリクスから以下値を確認します。
- SSDとキャパシティプールストレージの物理データ使用量 :
StorageUsed - Storage Efficiencyによるデータ削減量 :
StorageEfficiencySavings - SSDの物理データ使用量 :
All SSD StorageUsed - キャパシティプールストレージの物理データ使用量 :
All StandardCapacityPool StorageUsed
SSDの書き戻しが進むにつれてデータ削減量が減っていることが分かります。
また、SSDの物理データ使用量の増加速度とキャパシティプールストレージの物理データ使用量の減少速度が一致していません。
これはSSDに書き戻す際にInactive daat compressionによるデータ削減効果を維持できていなさそうです。
SSDの書き戻しが完了するまで待ちます。
CloudWatchメトリクスは以下のようになっていました。
階層化前と比較すると一目瞭然です。
SSDに書き戻されたデータはInactive daat compressionによるデータ削減効果を維持できていないことが分かります。
FSxN 2のStorage Efficiency、ボリューム、aggregate、Snapshotの情報は以下のとおりです。
FSxN 2
::*> volume efficiency show -volume vol1_dst -fields changelog-usage, changelog-size, logical-data-size, state, progress, last-op-size, last-op-begin, last-op-end
vserver volume state progress last-op-begin last-op-end last-op-size changelog-usage changelog-size logical-data-size
------- -------- -------- ----------------- ------------- ------------------------ ------------ --------------- -------------- -----------------
svm2 vol1_dst Disabled Idle for 00:00:00 - Sun Jan 21 01:22:58 2024 0B 0% 0B 0B
::*> volume show -volume vol1_dst -fields available, filesystem-size, total, used, percent-used, performance-tier-inactive-user-data, performance-tier-inactive-user-data-percent, size, dedupe-space-saved, dedupe-space-saved-percent, dedupe-space-shared,logical-used, logical-used-percent,logical-used-by-afs, logical-available, physical-used, physical-used-percent
vserver volume size available filesystem-size total used percent-used dedupe-space-saved dedupe-space-saved-percent dedupe-space-shared physical-used physical-used-percent logical-used logical-used-percent logical-available logical-used-by-afs performance-tier-inactive-user-data performance-tier-inactive-user-data-percent
------- -------- ------- --------- --------------- ------- ------- ------------ ------------------ -------------------------- ------------------- ------------- --------------------- ------------ -------------------- ----------------- ------------------- ----------------------------------- -------------------------------------------
svm2 vol1_dst 114.0GB 11.50GB 114.0GB 108.3GB 96.77GB 89% 126.4MB 0% 95.88GB 97.96GB 86% 96.77GB 89% - 96.77GB 0B 0%
::*> volume show-footprint -volume vol1_dst
Vserver : svm2
Volume : vol1_dst
Feature Used Used%
-------------------------------- ---------- -----
Volume Data Footprint 97.96GB 11%
Footprint in Performance Tier 99.06GB 100%
Footprint in FSxFabricpoolObjectStore 0B 0%
Volume Guarantee 0B 0%
Flexible Volume Metadata 580.0MB 0%
Delayed Frees 1.10GB 0%
File Operation Metadata 4KB 0%
Total Footprint 99.63GB 11%
Effective Total Footprint 99.63GB 11%
::*> aggr show-efficiency -instance
Name of the Aggregate: aggr1
Node where Aggregate Resides: FsxId05f23d527aa7ad7a7-01
Logical Size Used by Volumes, Clones, Snapshot Copies in the Aggregate: 339.1GB
Total Physical Used: 92.08GB
Total Storage Efficiency Ratio: 3.68:1
Total Data Reduction Logical Used Without Snapshots: 96.81GB
Total Data Reduction Physical Used Without Snapshots: 90.96GB
Total Data Reduction Efficiency Ratio Without Snapshots: 1.06:1
Total Data Reduction Logical Used without snapshots and flexclones: 96.81GB
Total Data Reduction Physical Used without snapshots and flexclones: 90.96GB
Total Data Reduction Efficiency Ratio without snapshots and flexclones: 1.06:1
Total Logical Size Used by Volumes, Clones, Snapshot Copies in the FabricPool Performance Tier: 339.2GB
Total Physical Used in FabricPool Performance Tier: 92.23GB
Total FabricPool Performance Tier Storage Efficiency Ratio: 3.68:1
Total Data Reduction Logical Used without snapshots and flexclones in the FabricPool Performance Tier: 96.89GB
Total Data Reduction Physical Used without snapshots and flexclones in the FabricPool Performance Tier: 91.12GB
Total FabricPool Performance Tier Data Reduction Efficiency Ratio without snapshots and flexclones: 1.06:1
Logical Space Used for All Volumes: 96.81GB
Physical Space Used for All Volumes: 96.69GB
Space Saved by Volume Deduplication: 126.4MB
Space Saved by Volume Deduplication and pattern detection: 126.4MB
Volume Deduplication Savings ratio: 1.00:1
Space Saved by Volume Compression: 0B
Volume Compression Savings ratio: 1.00:1
Space Saved by Inline Zero Pattern Detection: 0B
Volume Data Reduction SE Ratio: 1.00:1
Logical Space Used by the Aggregate: 98.29GB
Physical Space Used by the Aggregate: 92.08GB
Space Saved by Aggregate Data Reduction: 6.21GB
Aggregate Data Reduction SE Ratio: 1.07:1
Logical Size Used by Snapshot Copies: 242.3GB
Physical Size Used by Snapshot Copies: 1.19GB
Snapshot Volume Data Reduction Ratio: 202.99:1
Logical Size Used by FlexClone Volumes: 0B
Physical Sized Used by FlexClone Volumes: 0B
FlexClone Volume Data Reduction Ratio: 1.00:1
Snapshot And FlexClone Volume Data Reduction SE Ratio: 202.99:1
Number of Volumes Offline: 0
Number of SIS Disabled Volumes: 1
Number of SIS Change Log Disabled Volumes: 2
::*> aggr show -fields availsize, usedsize, size, physical-used, physical-used-percent, data-compaction-space-saved, data-compaction-space-saved-percent, data-compacted-count, composite-capacity-tier-used, sis-space-saved, sis-space-saved-percent, sis-shared-count, inactive-data-reporting-start-timestamp
aggregate availsize size usedsize physical-used physical-used-percent data-compaction-space-saved data-compaction-space-saved-percent data-compacted-count composite-capacity-tier-used sis-space-saved sis-space-saved-percent sis-shared-count inactive-data-reporting-start-timestamp
--------- --------- ------- -------- ------------- --------------------- --------------------------- ----------------------------------- -------------------- ---------------------------- --------------- ----------------------- ---------------- ---------------------------------------
aggr1 760.3GB 861.8GB 101.4GB 106.0GB 12% 6.21GB 6% 279.7MB 0B 6.21GB 6% 279.7MB -
::*> aggr show-space
Aggregate : aggr1
Performance Tier
Feature Used Used%
-------------------------------- ---------- ------
Volume Footprints 100.7GB 11%
Aggregate Metadata 6.91GB 1%
Snapshot Reserve 45.36GB 5%
Total Used 146.8GB 16%
Total Physical Used 106.0GB 12%
Total Provisioned Space 179.0GB 20%
Aggregate : aggr1
Object Store: FSxFabricpoolObjectStore
Feature Used Used%
-------------------------------- ---------- ------
Logical Used 0B -
Logical Referenced Capacity 0B -
Logical Unreferenced Capacity 0B -
Total Physical Used 0B -
2 entries were displayed.
::*> snapshot show -volume vol1_dst
---Blocks---
Vserver Volume Snapshot Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
svm2 vol1_dst
snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_051647
329.2MB 0% 0%
test.2024-01-20_0537 115.0MB 0% 0%
snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_055902
776.8MB 1% 1%
3 entries were displayed.階層化前は78.91GBだったSpace Saved by Aggregate Data Reductionが6.21GBになってしまっています。
転送先ボリュームでInactive data compressionを実行
転送先ボリュームでInactive data compressionを実行した時の挙動も確認しておきます。
FSxN 2
::*> volume efficiency inactive-data-compression start -volume vol1_dst -inactive-days 0
Inactive data compression scan started on volume "vol1_dst" in Vserver "svm2"
::*> volume efficiency inactive-data-compression show -volume vol1_dst -instance
Volume: vol1_dst
Vserver: svm2
Is Enabled: true
Scan Mode: default
Progress: RUNNING
Status: SUCCESS
Compression Algorithm: lzopro
Failure Reason: -
Total Blocks: -
Total blocks Processed: -
Percentage: 0%
Phase1 L1s Processed: 73772
Phase1 Lns Skipped:
L1: 0
L2: 0
L3: 0
L4: 0
L5: 0
L6: 0
L7: 0
Phase2 Total Blocks: 0
Phase2 Blocks Processed: 0
Number of Cold Blocks Encountered: 18846720
Number of Repacked Blocks: 0
Number of Compression Done Blocks: 18785536
Number of Vol-Overwrites: 0
Time since Last Inactive Data Compression Scan started(sec): 0
Time since Last Inactive Data Compression Scan ended(sec): 0
Time since Last Successful Inactive Data Compression Scan started(sec): -
Time since Last Successful Inactive Data Compression Scan ended(sec): 0
Average time for Cold Data Compression(sec): 0
Tuning Enabled: true
Threshold: 14
Threshold Upper Limit: 21
Threshold Lower Limit: 14
Client Read history window: 14
Incompressible Data Percentage: 0%
::*> volume efficiency inactive-data-compression show -volume vol1_dst -instance
Volume: vol1_dst
Vserver: svm2
Is Enabled: true
Scan Mode: -
Progress: IDLE
Status: SUCCESS
Compression Algorithm: lzopro
Failure Reason: -
Total Blocks: -
Total blocks Processed: -
Percentage: -
Phase1 L1s Processed: -
Phase1 Lns Skipped: -
Phase2 Total Blocks: -
Phase2 Blocks Processed: -
Number of Cold Blocks Encountered: 25229752
Number of Repacked Blocks: 0
Number of Compression Done Blocks: 25152384
Number of Vol-Overwrites: 0
Time since Last Inactive Data Compression Scan started(sec): 31
Time since Last Inactive Data Compression Scan ended(sec): 14
Time since Last Successful Inactive Data Compression Scan started(sec): -
Time since Last Successful Inactive Data Compression Scan ended(sec): 14
Average time for Cold Data Compression(sec): 17
Tuning Enabled: true
Threshold: 14
Threshold Upper Limit: 21
Threshold Lower Limit: 14
Client Read history window: 14
Incompressible Data Percentage: 0%13分ほどで完了しました。
Inactive data compression実行完了後のFSxN 2のStorage Efficiency、ボリューム、aggregate、Snapshotの情報は以下のとおりです。
FSxN 2
::*> volume efficiency show -volume vol1_dst -fields changelog-usage, changelog-size, logical-data-size, state, progress, last-op-size, last-op-begin, last-op-end
vserver volume state progress last-op-begin last-op-end last-op-size changelog-usage changelog-size logical-data-size
------- -------- -------- ----------------- ------------- ------------------------ ------------ --------------- -------------- -----------------
svm2 vol1_dst Disabled Idle for 00:00:00 - Sun Jan 21 01:56:49 2024 0B 0% 0B 0B
::*> volume show -volume vol1_dst -fields available, filesystem-size, total, used, percent-used, performance-tier-inactive-user-data, performance-tier-inactive-user-data-percent, size, dedupe-space-saved, dedupe-space-saved-percent, dedupe-space-shared,logical-used, logical-used-percent,logical-used-by-afs, logical-available, physical-used, physical-used-percent
vserver volume size available filesystem-size total used percent-used dedupe-space-saved dedupe-space-saved-percent dedupe-space-shared physical-used physical-used-percent logical-used logical-used-percent logical-available logical-used-by-afs performance-tier-inactive-user-data performance-tier-inactive-user-data-percent
------- -------- ------- --------- --------------- ------- ------- ------------ ------------------ -------------------------- ------------------- ------------- --------------------- ------------ -------------------- ----------------- ------------------- ----------------------------------- -------------------------------------------
svm2 vol1_dst 114.0GB 11.50GB 114.0GB 108.3GB 96.77GB 89% 126.4MB 0% 95.88GB 97.96GB 86% 96.77GB 89% - 96.77GB 0B 0%
::*> volume show-footprint -volume vol1_dst
Vserver : svm2
Volume : vol1_dst
Feature Used Used%
-------------------------------- ---------- -----
Volume Data Footprint 97.96GB 11%
Footprint in Performance Tier 98.99GB 100%
Footprint in FSxFabricpoolObjectStore 0B 0%
Volume Guarantee 0B 0%
Flexible Volume Metadata 580.0MB 0%
Delayed Frees 1.03GB 0%
File Operation Metadata 4KB 0%
Total Footprint 99.56GB 11%
Footprint Data Reduction 94.82GB 10%
Auto Adaptive Compression 94.82GB 10%
Effective Total Footprint 4.74GB 1%
::*> aggr show-efficiency -instance
Name of the Aggregate: aggr1
Node where Aggregate Resides: FsxId05f23d527aa7ad7a7-01
Logical Size Used by Volumes, Clones, Snapshot Copies in the Aggregate: 337.6GB
Total Physical Used: 14.31GB
Total Storage Efficiency Ratio: 23.59:1
Total Data Reduction Logical Used Without Snapshots: 95.28GB
Total Data Reduction Physical Used Without Snapshots: 14.15GB
Total Data Reduction Efficiency Ratio Without Snapshots: 6.73:1
Total Data Reduction Logical Used without snapshots and flexclones: 95.28GB
Total Data Reduction Physical Used without snapshots and flexclones: 14.15GB
Total Data Reduction Efficiency Ratio without snapshots and flexclones: 6.73:1
Total Logical Size Used by Volumes, Clones, Snapshot Copies in the FabricPool Performance Tier: 339.2GB
Total Physical Used in FabricPool Performance Tier: 16.02GB
Total FabricPool Performance Tier Storage Efficiency Ratio: 21.18:1
Total Data Reduction Logical Used without snapshots and flexclones in the FabricPool Performance Tier: 96.89GB
Total Data Reduction Physical Used without snapshots and flexclones in the FabricPool Performance Tier: 15.86GB
Total FabricPool Performance Tier Data Reduction Efficiency Ratio without snapshots and flexclones: 6.11:1
Logical Space Used for All Volumes: 95.28GB
Physical Space Used for All Volumes: 95.15GB
Space Saved by Volume Deduplication: 126.4MB
Space Saved by Volume Deduplication and pattern detection: 126.4MB
Volume Deduplication Savings ratio: 1.00:1
Space Saved by Volume Compression: 0B
Volume Compression Savings ratio: 1.00:1
Space Saved by Inline Zero Pattern Detection: 0B
Volume Data Reduction SE Ratio: 1.00:1
Logical Space Used by the Aggregate: 106.1GB
Physical Space Used by the Aggregate: 14.31GB
Space Saved by Aggregate Data Reduction: 91.77GB
Aggregate Data Reduction SE Ratio: 7.41:1
Logical Size Used by Snapshot Copies: 242.3GB
Physical Size Used by Snapshot Copies: 1.19GB
Snapshot Volume Data Reduction Ratio: 202.99:1
Logical Size Used by FlexClone Volumes: 0B
Physical Sized Used by FlexClone Volumes: 0B
FlexClone Volume Data Reduction Ratio: 1.00:1
Snapshot And FlexClone Volume Data Reduction SE Ratio: 202.99:1
Number of Volumes Offline: 0
Number of SIS Disabled Volumes: 1
Number of SIS Change Log Disabled Volumes: 2
::*> aggr show -fields availsize, usedsize, size, physical-used, physical-used-percent, data-compaction-space-saved, data-compaction-space-saved-percent, data-compacted-count, composite-capacity-tier-used, sis-space-saved, sis-space-saved-percent, sis-shared-count, inactive-data-reporting-start-timestamp
aggregate availsize size usedsize physical-used physical-used-percent data-compaction-space-saved data-compaction-space-saved-percent data-compacted-count composite-capacity-tier-used sis-space-saved sis-space-saved-percent sis-shared-count inactive-data-reporting-start-timestamp
--------- --------- ------- -------- ------------- --------------------- --------------------------- ----------------------------------- -------------------- ---------------------------- --------------- ----------------------- ---------------- ---------------------------------------
aggr1 841.9GB 861.8GB 19.91GB 18.48GB 2% 91.77GB 82% 4.10GB 0B 91.77GB 82% 4.10GB -
::*> aggr show-space
Aggregate : aggr1
Performance Tier
Feature Used Used%
-------------------------------- ---------- ------
Volume Footprints 100.7GB 11%
Aggregate Metadata 11.00GB 1%
Snapshot Reserve 45.36GB 5%
Total Used 65.26GB 7%
Total Physical Used 18.48GB 2%
Total Provisioned Space 179.0GB 20%
Aggregate : aggr1
Object Store: FSxFabricpoolObjectStore
Feature Used Used%
-------------------------------- ---------- ------
Logical Used 0B -
Logical Referenced Capacity 0B -
Logical Unreferenced Capacity 0B -
Total Physical Used 0B -
2 entries were displayed.
::*> snapshot show -volume vol1_dst
---Blocks---
Vserver Volume Snapshot Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
svm2 vol1_dst
snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_051647
329.2MB 0% 0%
test.2024-01-20_0537 115.0MB 0% 0%
snapmirror.a809406f-b751-11ee-b8c0-db82abb5ccf5_2163009838.2024-01-20_055902
776.8MB 1% 1%
3 entries were displayed.SSDの物理データ使用量がキャパシティプールストレージに階層化する前の水準まで戻りました。
CloudWatchメトリクスからも確認します。
ちょっと分かりづらいですね。
Inactive data compressionを実行した時間帯にフォーカスします。
Inactive data compressionを実行することでSSDの物理データ使用量が削減されていることが分かります。
SnapMirrorの転送先がTiering Policy Allの場合においても転送元でInactive data compressionを「わざわざ」かけるメリットはある
検証のポイントであった以下2点の結果は以下になります。
- Inactive data compressionのデータ削減効果を維持した状態でSnapMirrorで転送できるか
- -> 維持した状態で転送できる
- 転送後、キャパシティプールストレージに階層化されたデータをSSDに書き戻す際に圧縮した状態で書き戻せられるか
- -> 圧縮した状態で書き戻せられない
Tiering PolicyはAllであっても一度SSDに書き込まれます。そのため、SnapMirrorでテータ転送する際は転送先のSSDを圧迫しないように余裕を持ってSSDのサイズをプロビジョニングしたり、帯域制御を操作したりすることが必要になります。
データ削減効果を維持した状態で転送できることにより、キャパシティプールストレージに階層化されるまでに使用するSSDの物理データ使用量の削減に繋がります。結果として上述の「余裕を持ってSSDのサイズをプロビジョニングする量」の削減に繋がります。
また、SnapMirrorの転送元でInactive data compressionがかかることで転送量が減少します。これにより、転送時間と転送量にかかる料金を抑えることが可能というメリットもあります。
ただし、以下記事で検証しているとおり、Inactive data compressionは1つのファイルシステムに同時に1ボリュームしか実行できません。
そのため、トータルの移行作業の時間削減にプラスの影響があるかは要検討です。
大量のデータと大量のボリュームがある場合、手動でInactive data compressionを実行するオペレーションは大変だと思います。各ボリュームに対してvolume efficiency inactive-data-compression modifyで以下設定を1に変更した状態にしておいて、日次のバックグラウンド処理に任せるのが良いでしょう。
[-threshold-days
] - Inactive data compression scan threshold days value
Threshold days value for inactive data compression scan.[-threshold-days-min
] - Inactive data compression scan threshold minimum allowed value.
Minimum allowed value in threshold days for inactive data compression scan.[-threshold-days-max
] - Inactive data compression scan threshold maximum allowed value.
Maximum allowed value in threshold days for inactive data compression scan.
こうすることで最後にアクセスされて1日以上経過したデータブロックは圧縮されます。
以上の理由から、「SnapMirrorの転送先がTiering Policy Allの場合においても転送元でInactive data compressionを『わざわざ』かけるメリットはある」と考えています。
一方で、圧縮した状態で書き戻せられないのは気になります。
FSxNに移行する際にはSSDのプロビジョニングサイズ削減のため、以下のようにTiering Policyを設定することが多いと認識しています。
- 移行時はTiering Policy All
- 移行完了後にTiering Policy Auto
こうすることで、以下のように頻繁にアクセスされるデータ分のみのSSDをプロビジョニングすることに繋がります。
- あまりアクセスされないデータについては安価なキャパシティプールストレージにそのまま
- 頻繁にアクセスするデータについては高速なSSDに書き戻し
本検証で確認したとおり、SSDに書き戻す際には圧縮効果が失われてしまいます。そのため、SSDに書き戻されると、キャパシティプールストレージ上での物理データ使用量以上のSSDの物理データ使用量となってしまいます。
SSDに書き戻されたデータに対してInactive data compressionがかかるように、忘れずにInactive data compressionの設定をしておきましょう。
この記事が誰かの助けになれば幸いです。
以上、AWS事業本部 コンサルティング部の のんピ(@non____97)でした!
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