Example: Configuring a vault-vault cascade

An example will show in concrete terms how you can configure replication relationships one step at a time. You can use the vault-vault cascade deployment configured in the example to retain more than 251 Snapshot copies labeled my-weekly.

Before you begin

About this task

The example assumes the following:

The example shows how to create replication relationships based on two custom policies:

Procedure

  1. On the secondary destination cluster, create the snapvault_secondary policy:cluster_secondary::> snapmirror policy create -policy snapvault_secondary -type vault -comment “Policy on secondary for vault to vault cascade” -vserver svm_secondary
  2. On the secondary destination cluster, define the my-daily rule for the policy:cluster_secondary::> snapmirror policy add-rule -policy snapvault_secondary -snapmirror-label my-daily -keep 7 -vserver svm_secondary
  3. On the secondary destination cluster, define the my-weekly rule for the policy:cluster_secondary::> snapmirror policy add-rule -policy snapvault_secondary -snapmirror-label my-weekly -keep 52 -vserver svm_secondary
  4. On the secondary destination cluster, define the my-monthly rule for the policy:cluster_secondary::> snapmirror policy add-rule -policy snapvault_secondary -snapmirror-label my-monthly -keep 180 -vserver svm_secondary
  5. On the secondary destination cluster, verify the policy: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 -        -
  6. On the secondary destination cluster, create the relationship with the source cluster:cluster_secondary::> snapmirror create -source-path svm_primary:volA -destination-path svm_secondary:volA -type XDP -schedule my_snapvault -policy snapvault_secondary
  7. On the secondary destination cluster, initialize the relationship with the source cluster:cluster_secondary::> snapmirror initialize -source-path svm_primary:volA -destination-path svm_secondary:volA
  8. On the tertiary destination cluster, create the snapvault_tertiary policy:cluster_tertiary::> snapmirror policy create -policy snapvault_tertiary -type vault -comment “Policy on tertiary for vault to vault cascade” -vserver svm_tertiary
  9. On the tertiary destination cluster, define the my-weekly rule for the policy:cluster_tertiary::> snapmirror policy add-rule -policy snapvault_tertiary -snapmirror-label my-weekly -keep 250 -vserver svm_tertiary
  10. On the tertiary destination cluster, verify the policy: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 -        -
  11. On the tertiary destination cluster, create the relationship with the secondary cluster:cluster_tertiary::> snapmirror create -source-path svm_secondary:volA -destination-path svm_tertiary:volA -type XDP -schedule my_snapvault -policy snapvault_tertiary
  12. On the tertiary destination cluster, initialize the relationship with the secondary cluster:cluster_tertiary::> snapmirror initialize -source-path svm_secondary:volA -destination-path svm_tertiary:volA