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Netbackup7.5 and Exchange2010DAG unable toTruncate Logs

Created: 17 Oct 2012 • Updated: 21 Mar 2013 | 3 comments
Sachinsri2's picture
This issue has been solved. See solution.



Netbackup 7.5

Exchnage 2010 DAG environment (2Mailbox server, 1 CAS server, 1 DR server for replication)

Problem  Unable to truncate the Transation logs even after full Backup from Netbackup.

Is there any setting is required to be done on Netbackup Server. Please assist me

Thanks & Regards

Sachin Srivastava

Comments 3 CommentsJump to latest comment

Alex Zn's picture

Is it possible for you enable Circular logging on Exchange servers?

Marianne's picture

Incremental backups are not possible when Circular logging is enabled.

Please bear in mind that NBU never truncates logs. It notifies Exchange of successful backup. Exchange then needs to truncate the logs.

See this extract from the NBU for Exchange manual:

Exchange truncates all committed transaction logs after NetBackup notifies it that the backup succeeded. In replicated environments, the truncation is scheduled and does not occur immediately.

Create bpbkar log folder on all DAG members.
Check bpbkar log(s) as well as Application logs after next backup.

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

Mark_Solutions's picture

The backup needs to have completed 100% succesful t truncate the logs

If any part of the backup failed then no logs would be truncated - this is why many people have several policies, one for each Storage Group, so that should one fail the others still get trunctated

For exchange itself it may take several hours before the truncation runs and all replication must be health and up to date for everything to work as it should do

Hope this helps

Authorised Symantec Consultant

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