Hi Guys, I was wondering if there is a way to configure SM in such a way that it use the current SnapShots on a volume, for mirroring, without creating new snapshots. I have a few volumes that is mirrored to a new production environment, and from the new environment, I want to mirror the data, while being mirrored to the new environment, to mirror also to the DR environment. I know I can create a mirror instance from the old to the new DR environment, but due to space limitations, and bandwidth issues I am not able to do that. (The amount of snapshot space needed for the initial transfer exceeds the amount of data space available on the old aggregates.)
#SnapMirror replication
tawdry jasper
sick marten
you can create snapmirror from a snapshot of a volume Ex : snapmirror create -source-path source_vserver:source_volume -destination-path dest_vserver:dest_volume -type XDP after that snapmirror initialize -destination-path dest_vserver:dest_volume -source-snapshot existing_snapshot_name
[-source-snapshot | -s <text>] - Source Snapshot
This optional parameter specifies the Snapshot copy that snapmirror initialize will use for the baseline transfer. For data protection (DP) relationships, the baseline transfer will include all
of the Snapshot copies up to and including the specified Snapshot copy. For extended data protection (XDP) relationships, the snapmirror initialize command behavior depends on the snapmirror
policy associated with the relationship. If the policy type is async-mirror then depending on the rules in the policy it can transfer either all the Snapshot copies up to and including the
specified Snapshot copy or only the specified Snapshot copy from the source volume to the destination volume. For extended data protection (XDP) relationships with policy type vault or
mirror-vault the snapmirror initialize transfers only the specified Snapshot copy. This parameter is not supported for SnapMirror Synchronous relationships and relationships with "Relationship
Capability" of "Pre 8.2".
in ontap cli just type man before an command and you will see full option tree + examples
you can create also an vault / backup of a DP volume
tawdry jasper
Thanks, but will it from there contniue to use existing snapshots? It will not be able to create "mirror" snapshots.
sick marten
ex A source ----> snapmirror ---> B ( primary DR site where the vol is DP ) -----> C mirror-vault /vault ( 2nd Backup site )
snapshots are chained data ; since you will always have an initial copy and all the others are incremental over it what i described and also stated in the doc above shows how to set the initial baseline transfer from a snapshot
you can do one time mirror if that is what you want