示例：配置保管/保管级联

本节将通过一个示例具体说明如何逐步配置复制关系。您可以使用示例中配置的保管/保管级联部署方式来保留超过 251 个具有my-weekly标签的快照拷贝。

开始之前

源集群和目标集群以及 SVM 必须建立对等关系。
早期的 ONTAP 版本不支持保管/保管级联。

关于本任务

本示例假设以下情况：

已在源集群上配置具有以下 SnapMirror 标签的快照拷贝：my-daily、my-weekly和my-monthly。
已在辅助和三级目标集群上配置名为volA的目标卷。
已在辅助和三级目标集群上配置名为my_snapvault的复制作业计划。

本示例将显示如何基于两个自定义策略来创建复制关系：

snapvault_secondary策略在辅助目标集群上保留 7 个每日、52 个每周和 180 个每月快照拷贝。
snapvault_tertiary策略在三级目标集群上保留 250 个每周快照拷贝。

在辅助目标集群上，创建snapvault_secondary策略：cluster_secondary::>snapmirror policy create -policy snapvault_secondary -type vault -comment “Policy on secondary for vault to vault cascade” -vserver svm_secondary
在辅助目标集群上，为策略定义my-daily规则：cluster_secondary::>snapmirror policy add-rule -policy snapvault_secondary -snapmirror-label my-daily -keep 7 -vserver svm_secondary
在辅助目标集群上，为策略定义my-weekly规则：cluster_secondary::>snapmirror policy add-rule -policy snapvault_secondary -snapmirror-label my-weekly -keep 52 -vserver svm_secondary
在辅助目标集群上，为策略定义my-monthly规则：cluster_secondary::>snapmirror policy add-rule -policy snapvault_secondary -snapmirror-label my-monthly -keep 180 -vserver svm_secondary

在辅助目标集群上，验证该策略：cluster_secondary::>snapmirror policy show snapvault_secondary -instance

                     Vserver: svm_secondary 
      SnapMirror Policy Name: snapvault_secondary
      SnapMirror Policy Type: vault
                Policy Owner: cluster-admin
                 Tries Limit: 8
           Transfer Priority: normal
   Ignore accesstime Enabled: false
     Transfer Restartability: always
 Network Compression Enabled: false
             Create Snapshot: false
                     Comment: Policy on secondary for vault to vault cascade
       Total Number of Rules: 3
                  Total Keep: 239
                       Rules: SnapMirror Label     Keep  Preserve Warn Schedule Prefix
                              ----------------     ----  -------- ---- -------- ------
                              my-daily                7  false       0 -        -
                              my-weekly              52  false       0 -        -
                              my-monthly            180  false       0 -        -

在辅助目标集群上，创建与源集群的关系：cluster_secondary::>snapmirror create -source-path svm_primary:volA -destination-path svm_secondary:volA -type XDP -schedule my_snapvault -policy snapvault_secondary
在辅助目标集群上，初始化与源集群的关系：cluster_secondary::>snapmirror initialize -source-path svm_primary:volA -destination-path svm_secondary:volA
在三级目标集群上，创建snapvault_tertiary策略：cluster_tertiary::>snapmirror policy create -policy snapvault_tertiary -type vault -comment “Policy on tertiary for vault to vault cascade” -vserver svm_tertiary
在三级目标集群上，为策略定义my-weekly规则：cluster_tertiary::>snapmirror policy add-rule -policy snapvault_tertiary -snapmirror-label my-weekly -keep 250 -vserver svm_tertiary

在三级目标集群上，验证该策略：cluster_tertiary::>snapmirror policy show snapvault_tertiary -instance

                     Vserver: svm_tertiary  
      SnapMirror Policy Name: snapvault_tertiary
      SnapMirror Policy Type: vault
                Policy Owner: cluster-admin
                 Tries Limit: 8
           Transfer Priority: normal
   Ignore accesstime Enabled: false
     Transfer Restartability: always
 Network Compression Enabled: false
             Create Snapshot: false
                     Comment: Policy on tertiary for vault to vault cascade
       Total Number of Rules: 1
                  Total Keep: 250
                       Rules: SnapMirror Label     Keep  Preserve Warn Schedule Prefix
                              ----------------     ----  -------- ---- -------- ------
                              my-weekly             250  false       0 -        -

在三级目标集群上，创建与辅助集群的关系：cluster_tertiary::>snapmirror create -source-path svm_secondary:volA -destination-path svm_tertiary:volA -type XDP -schedule my_snapvault -policy snapvault_tertiary
在三级目标集群上，初始化与辅助集群的关系：cluster_tertiary::>snapmirror initialize -source-path svm_secondary:volA -destination-path svm_tertiary:volA

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