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Replication Manager - Clone
Currently run a clone at night which is mounted to another host for backup purposes. Also have another job that runs a clone throughout the day. We would like to only use one clone lun to run both jobs. Since replication manager does not allow you to use the same storage how can I schedule a job to mount the clone at night and then run during the day. I don’t want to unmount and mount the clone each time. Basically use one lun, only mount the clone at night. Do I need to run a script to mount the clone after the job completes and then schedule another script in the morning to unmount so the clones during the day run. If so what is the syntax or is there another way.
AranH1
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November 18th, 2009 09:00
I think there are a few ways to accomplish this. The easiest may be to use a combination of snapshots and clones. The steps below are what I would try first. Note that these steps will work if you are using a CLARiiON array because on a CLARiiON a snapshot of a clone will survive the resynch of the clone to its production source. This will not work on a Symmetrix because the architecture of snaps of clones is different.
1. RM job Clone1 is scheduled to run at night. Clone is not mounted to a host.
2. RM job Snap1 is linked to nightly clone and mounted to backup host. A backup script is configured as part of the RM job to run the backup of the data.
3. RM job Clone1 is scheduled to run during the day. Again, the clone is not mounted to a host. The snapshot will remain mounted to the backup host and will remain in place, as any changes to the source clone are copied to the Reserved LUN Pool.
4. RM job Clone1 runs at night again.
2 RM job Snap1 runs again, dismounting the snapshot first, then refreshing the snapshot to the source clone LUN.
The process above should work and meet your requirements of multiple clone synchs using the same clone LUNs and enabling a backup to run on a nightly basis. I have done similar setups in RM and it works fine.
Let me know if this helps.
Aran
mdemarcork
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November 18th, 2009 10:00
Does the snapshot keep track of the source or clone changes. Also will there be any issues with RM or the snapshot when the clone updates.
AranH1
2.2K Posts
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November 18th, 2009 12:00
You will be taking a snapshot of the clone, so that is the snap source. The array will track the changes to the source clone. When the clone is synchronized while a snapshot is active against it, any blocks on the clone that will be overwritten during the synchronization will first be copied to the RLP to ensure the snapshot still has access to the blocks from the point in time that the snapshot session was created.
This is all in the context of a CLARiiON array though. You haven't stated what type of array you have or the FLARE code you are running on the array. If you tell me that information I can ensure that my comments are in the context of your infrastructure.
AranH1
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November 18th, 2009 13:00
You should be fine then. If you can I recommend that you run the latest version of RM, there are lots of fixes and feature enhancements that go into each release. Just make sure that you have all the correct versions of the supporting software (microsoft hotfixes, SE, etc...) as not having the correct version of the supporting software can cause jobs to fail or behave erratically.
mdemarcork
11 Posts
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November 18th, 2009 13:00
Clariion, flare code 26. Ok thanks this definitely seems like the best option I have come across. I will test and let you know any issues. Thanks so much for your help.