Best practice when enabling circular logging on CCR cluster
Environment is E2007 SP2 RU2 with CCR cluster pairs. I have to move mailboxes this weekend and I would like to temporarily enable circular logging on the affected storage groups. Here's my planned approach. Enable circular logging on the storage groups via the EMC. Restart the Information Store service on the passive node Use the Managed Clustered Mailbox Server Wizard to move the CMS from the active to the passive node Restart the Information Store service on the new passive (normally active) node Use the Managed Clustered Mailbox Server Wizard to move the CMS back to the original node. Does that look reasonable, or is there an better method? Also, I'm working on the assumption that I only need to enable circular logging on the target SGs. The target SGs won't have high transaction log activity during the mailbox moves. Is this a safe assumption? Alexei
May 14th, 2010 2:02am
Ok, found a good link for this: http://www.telnetport25.com/component/content/article/318-switching-ccr-storage-groups-into-circular-logging-during-migration-and-why-you-might-want-to-do-this.html Alexei
May 14th, 2010 4:16am
If you need to do this on destination storage groups ( no need on the source SGs), follow: http://technet.microsoft.com/en-us/library/bb331951(EXCHG.80).aspx Suspend continuous replication by using the Suspend-StorageGroupCopy cmdlet. Enable or disable circular logging. For detailed steps about how to enable or disable circular logging, see How to Enable or Disable Circular Logging for a Storage Group. Dismount and then mount the database in the storage group that is being enabled or disabled for circular logging. Resume continuous replication by using the Resume-StorageGroupCopy cmdlet. Be sure to disable circular logging when done. Note you cannot do online backups while circular logging is enabled.
May 14th, 2010 6:08am
Thanks Andy That matches what the other Andy had in his article. Alexei
May 14th, 2010 7:33am
Sorry guys but this does not work for CCR. I opened a case and was instructed to restart the store service and now it works like a charm. Logs are not quick to commit so you will see a number of logs numbering into the hundreds for larger moves but is indeed circular. Good luck.
July 9th, 2010 7:31pm
The steps as shown worked for me and there was no need to restart the store. It's even easier in E2010 as there is no need to dismount the store or even suspend replication. Alexei
July 11th, 2010 4:30am