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Dell Unity™ Family Unisphere® Command Line Interface User Guide

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Run a precheck for existing common base snapshots

Find common base snapshots on a NAS server or in a file replication session before you perform a failback operation. Using existing common base snapshots allows you to use the avoid full copy feature and perform a delta synchronization. This type of synchronization sends only data that has changed after the failover back to the source system.

NOTE:This command applies only to file synchronous replication.

Common base snapshots can be snapshots that were created according to an established schedule and replicated to the destination. Common base snapshots can also be manually created on the source and replicated to the destination system.

NOTE:The precheck can only be performed with the CLI. It cannot be performed in the Unisphere UI.

Format

/prot/rep/session/commonbase {-session <value> | -sessionName <value>} show -detail

Object qualifiers


Qualifier	Description
-session	Identifies the replication session by ID number.
-sessionName	Identifies the replication session by an assigned name.
-detail	Show snapshot details.

Example

The following example shows a check for common base snapshots in a synchronous file replication session.

uemcli /prot/rep/session/commonbase –session 171798691845_FCNCH097274B3A_0000_171798691846_FCNCH097274B37_0000 show -detail

[Response]
Storage system address: 10.64.75.201
Storage system port: 443
HTTPS connection

1:    Session ID                            = 171798691845_FCNCH097274B3A_0000_171798691846_FCNCH097274B37_0000
      Session name                          = Rep1
      Source common base snapshot ID        = 171798691846
      Source common base snapshot name      = Snap1
      Destination common base snapshot ID   = 171798691848
      Destination common base snapshot name = Snap1

ID = 171798691845_FCNCH097274B3A_0000_171798691846_FCNCH097274B37_0000
Operation completed successfully.