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2635
May 11th, 2011 23:00
NetWorker 7.6SP2 VADP Backup fails
Hi All,
I am installing a NetWorker 7.6.2 into a new environment and I have so far configured successful backups for several guest servers in the VM environment using VADP.
However we have a 1TB thick provisioned guest that is failing to backup. So far this is the only guest that is failing to backup under the new API. The backup connects through into the VCenter and performs that snapshot, in power path you can see SAN traffic however after approximately 10mins the backup retries.
Also in the savegroup status/messages the backup appears to follow the same path as the successful ones upto the point where it reports all the VM information correctly, the correct LUN etc, this is where the backup fails however there appears to be a siginificant lack of error messages to aid trouble shooting. I know the LUN is ok as we vmotioned another guest to the same LUN and backed that one up fine. So this looks like a NetWorker 7.6SP2 / VADP issue.
My Question is this:
Are there any timeout settings that are preconfigured to 10mins?
Below is how far the backup gets and the messages it produces
May 12 09:57:20 tps-backup.tps.uk.net: End time: Thu May 12 09:57:20 2011
May 12 09:57:20 tps-backup.tps.uk.net: --- Unsuccessful Save Sets ---
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* savegrp: suppressed 41 lines of output.
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* Configuration downloaded successfully for VM 'tps10'.
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL*
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* Following are the details of the client tps10:
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* VirtualCenter : 172.16.0.89
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* ESX Server : tpsvmhost-c.tps.uk.net
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* DataCenter Name : TPS
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* ConfigDatastore Name : ESX_Prod_Lun7
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* Resourcepool Name : /
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL*
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* Following is the disk information of the client tps10:
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* Disk 1 Label : Hard disk 1
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* Disk 1 Size : 1029.9 GB
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* Disk 1 Datastore name : ESX_Prod_Lun7
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* Total Number of Disks : 1
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL*
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* Obtained the virtual disks for the VM.
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* Change block tracking is disabled for VM: tps10
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* File level Recovery from Image level backup is enabled.
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* MORef for the VM is obtained.
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* Obtained the virtual disks for the VM.
May 12 09:57:20 tps-backup.tps.uk.net: * tps10:*FULL* Using 'san' as the transport mode for Hard disk 1.
Thanks,
Mark.


AllanW1
334 Posts
0
May 16th, 2011 06:00
Hi Mark,
It looks like the only timeout set to 10 min in VADP is VADP_MAX_BACKOFF_TIME which is set to 10 by default. This timeout is to be used in conjunction with VADP_MAX_RETRIES.
As the issue definitely looks like a timeout problem, I’d think best to start with VADP_MAX_RETRIES=10 and VADP_MAX_BACKOFF_TIME=20 in the client APPINFO and see if the issue reoccurs. If it does, investigation needs to start with debugging client side as well as VADP part itself.
Thanks and let us know.
Allan