Hi all, I currently experiencing very strange slow restores... :)
When I'm doing a mailbox database restore from DPM 2010, in it's original location, recovery db or in Folder, the restore is going very very slow ?
# Example1: Restore in a folder (DPM's local folder) :
First the restore of the File.EDB is done quickly :)
Then restore of logs are very slow ? by pressing "F5" key, I can see the numbers of the log files increase 1 or 2 log per second...
I can restore 1,5 Go in 8 minutes.
# Example2: Restore in recovery DB :
First restore of File.EDB is also done quickly
Then restore of log are very slow...
in the event viewer I can see this event "MSExchangeIS - 9756 - Exchange VSS Writer successfully restored the backup set to database 'recoverydb'. To bring the restored databases to a clean-shutdown state, database recovery will be performed using the
information in the restore environment document 'G:\recoverydb\_restoredLogs\E03restore.env'.
For me it's mean that the next step is to replay the logs.
So I'm waiting for Event "ESE - 301 - Information Store (7976) recoverydb: The database engine has begun replaying logfile G:\recoverydb\_restoredLogs\E030000xxxx.log. but it's take a long time to come ^^ And when the first Event Id 301 appears, it's took only
a few second to replay hundred of logs... Then the restore is finished :)
In term of metric => Restore of 600 Mo DB take almost 1 hour...
I did a manual test to copy files to the exchange server from the DPM server and vice versa => it was quite fast so I think the network is not an issue.
My configuration are the following :
2 DPM VM VMware - W2008R2 SP1 - 8 Cpu / 8 Go Ram / 1 Nic 15Go
DPM 2010 QFE 1 & 2
Exchange 2010 - DAG - 6 nodes - 12 DB - 1 Active db + 1 Passive db / split on two locations
AV Exclusions are set properly according to kb
http://technet.microsoft.com/en-us/library/bb808691.aspx
(AV => McAfee 8.7.0i Viruscan Enterprise)
I did a lot perfmon on CPU / RAM / Paging File / Disk / Nic during retorations operations and i found no bottleneck
I read this blog too http://briandesmond.com/blog/dpm-and-anti-virus-exclusions/ but i did'nt have time yet to test it ? Someone could confirm that exclusion of Eseutil is requires ?
I think that the next step is to remove the AV and doing some tests, but if AV is not guilty (AV must be guilty :) )... Where I have to looking for ? If someone have and idea ?
Stephane