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还原FlexGroup卷后、Snapshot大小会增加

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Category:
ontap-9
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core
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适用场景

  • ONTAP 9
  • FlexGroup
  • Snapshot
  • SnapMirror

问题描述

通过SnapMirror执行还原后、如果您保存相同的数据并创建快照、则该大小会更大。
  1. 初始状态:已创建Snapshot snap1。
Cluster::> snapshot show -vserver svm1 -volume fg1
---Blocks---
Vserver  Volume   Snapshot                  Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
svm1    fg1
     snapmirror.ac47a19b-ee9b-11ef-bc5d-00a098d0b873_2160483137.2025-02-19_033710
                            688KB    0%   0%
     snap1                  983.6MB    0%   50%
  1. 保存一个6.5 GB的文件。
  2. 创建Snapshot Snap2。
Cluster::> snapshot create -vserver svm1 -volume fg1 -snapshot snap2
 
Snap2的大小与逻辑数据大小几乎相同。
Cluster::> snapshot show -vserver svm1 -volume fg1
---Blocks---
Vserver  Volume   Snapshot                  Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
svm1    fg1
     snap1                  983.6MB    0%   13%
     snapmirror.ac47a19b-ee9b-11ef-bc5d-00a098d0b873_2160483137.2025-02-20_012822
                            988.2MB    0%   13%
     snap2                   6.53GB    3%   50%
  1. 执行SnapMirror更新。
  2. 使用snap1执行SnapMirror还原以还原到初始状态。
  3. 再次保存相同的6.5 GB文件。
  4. 创建Snapshot Snap3。
Cluster::> snapshot create -vserver svm1 -volume fg1 -snapshot snap3
 
观察到Snapshot Snap3大于Snap2。
Cluster::> snapshot show -vserver svm1 -volume fg1
---Blocks---
Vserver  Volume   Snapshot                  Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
svm1    fg1
     snap1                  983.6MB    0%   12%
     snap2                   6.53GB    3%   48%
     snapmirror.ac47a19b-ee9b-11ef-bc5d-00a098d0b873_2160483137.2025-02-20_013129
                            6.53GB    3%   48%
     restored.d59573cc-edc1-11ef-bc5d-00a098d0b873_2160483134.snap1.2025-02-20_013521
                            1.78GB    1%   20%
     snap3                   6.94GB    3%   50%

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