Releasing partners from a SnapMirror relationship

When to release partners from a SnapMirror relationship

If you want to permanently end a SnapMirror relationship between a source and destination volume or qtree, you invoke different commands on the source and destination storage systems.

On the source system, you use the snapmirror release command. Releasing a source from a destination volume or qtree allows the source to delete its base Snapshot copy for the SnapMirror relationship. See How to release a source from a SnapMirror relationship below.
On the destination system, you use the snapmirror break command, and carry out some additional operations. See How to scrub a destination of a broken SnapMirror relationship.

How to release a source from a SnapMirror relationship

To release a source from a SnapMirror relationship, complete the following step.

Step	Action
1	On the source system, enter the following command: *snapmirror release {source_volume* \| qtree_path} [dest_system:]{dest_volume \| qtree_path}** source_volume or qtree_path is the name of the source volume or path to the qtree that you want to release from the destination. dest_system is the name of the system where the destination is located. dest_volume or qtree_path is the name of the volume or path to the qtree that is the destination. If you do not enter the name of the destination system, SnapMirror uses the name of the system on which you entered the command. Result SnapMirror frees all resources on the source system that had been dedicated to the SnapMirror relationship.

Step

Action

On the source system, enter the following command:

snapmirror release {source_volume | qtree_path} 
[dest_system:]{dest_volume | qtree_path}

source_volume or qtree_path is the name of the source volume or path to the qtree that you want to release from the destination.

dest_system is the name of the system where the destination is located.

dest_volume or qtree_path is the name of the volume or path to the qtree that is the destination.

If you do not enter the name of the destination system, SnapMirror uses the name of the system on which you entered the command.

Result

SnapMirror frees all resources on the source system that had been dedicated to the SnapMirror relationship.

Volume example

systemA> snapmirror release vol0 systemB:vol2

Qtree example

systemA> snapmirror release vol/vol1/qtree2 
systemB:/vol/vol2/qtree5

How to scrub a destination of a broken SnapMirror relationship

In order to permanently break a SnapMirror relationship on a destination volume or qtree, you need to carry out extra steps in addition to invoking snapmirror break on the destination storage system and snapmirror release on the source system. Unless these extra steps are taken, the Snapshot copies associated with the broken relationship remain stored on the destination system, and a snapmirror status command will continue to list the former destination object as a current destination object. To scrub a destination of a SnapMirror relationship, complete the following steps.

Step	Action
1	If you have not already done so, invoke the `snapmirror break` command on the destination system to break the SnapMirror relationship between the source and destination objects. For details see Converting to a writable volume or qtree. invoke the `snapmirror release` command on the source system to release the source object from this SnapMirror relationship. For details see How to release a source from a SnapMirror relationship.
2	On the destination system, invoke the `snapmirror status -l` command to determine which Snapshot copy basename is associated with the SnapMirror relationship that you just broke. For broken SnapMirror volume relationships enter: snapmirror status -l dest_vol For broken SnapMirror qtree relationships enter: snapmirror status -l /vol/dest_vol/dest_qtree In the detailed output that is displayed, note the Snapshot copy basename associated with the SnapMirror relationship that you just broke.
3	On the destination system, delete the Snapshot copy set that you displayed in Step 2. Enter: snap delete dest_vol snapshot_basename
4	Through the Adminhost client, edit the /etc/snapmirror.conf file on the destination system. Locate and delete the entry that specifies the SnapMirror relationship you want to end. For details on editing the /etc/snapmirror.conf file, see snapmirror.conf file entry syntax.