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SnapMirror 策略类型是什么以及它们的含义是什么?

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可不使用  

适用于

  • 集群模式 Data ONTAP 8.3 
  • ONTAP 9 

解答

SnapMirror 策略类型从适用于 Ver-Flexible 的集群模式 Data ONTAP 8.3 开始引入(也称为 ONTAP 9 及更高版本中的统一复制) SnapMirror 关系。这些策略类型对 SnapMirror 关系的行为有显著影响,并在选择要复制和保留的数据时提供更大的灵活性。还创建了其他默认策略来使用新策略类型。

策略类型:

异步镜像—行为与 DP 镜像相似。此策略类型不支持具有用户定义快照标签的规则。它只允许使用两个预定义的标签:sm_createdall_source_snapshots。对于这两个标签,此策略规则仅支持两种组合形式,即sm_created或者sm_created和all_source_snapshots。 
mirror-vault —允许将 DR 和数据存储到同一卷中。将源的活动文件系统复制到目标,并允许目标将数据保留更长时间。使用 sm_created 或系统定义 / 自定义规则复制数据、并使用基于用户定义的快照标签的用户定义规则保留较长的时间。 
仅限 Vault – Vault 和备份。此策略类型定义了一种关系为 SnapVault 而不是 Ver-Flexible SnapMirror 。

默认策略

clusterA::> snapmirror policy show
Vserver Policy             Policy Number         Transfer
Name    Name               Type   Of Rules Tries Priority Comment
------- ------------------ ------ -------- ----- -------- ----------
clusterA
        DPDefault         async-mirror  1     8  normal  Default policy for DP relationship.
  SnapMirror Label: sm_created                         Keep:       1
                                                Total Keep:       1
 
clusterA
        MirrorAllSnapshots async-mirror  2     8  normal  Asynchronous SnapMirror policy for mirroring all snapshots and the latest active file system.
  SnapMirror Label: sm_created                        Keep:       1
                    all_source_snapshots                           1
                                                 Total Keep:       2
 
clusterA
        MirrorAndVault    mirror-vault  3     8  normal  A unified Asynchronous SnapMirror and SnapVault policy for mirroring the latest active file system and daily and weekly snapshots.
  SnapMirror Label: sm_created                         Keep:       1
                    daily                                          7
                   weekly                                        52
                                                 Total Keep:      60
 
clusterA
        MirrorLatest      async-mirror  1     8  normal  Asynchronous SnapMirror policy for mirroring the latest active file system.
  SnapMirror Label: sm_created                         Keep:       1
                                                 Total Keep:       1
 
clusterA
        XDPDefault        vault         2     8  normal  Default policy for XDP relationship with daily and weekly rules.
  SnapMirror Label: daily                              Keep:       7
                    weekly                                       52
                                                 Total Keep:      59

 

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