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Marianne's avatar
Marianne
Level 6
12 years ago

Exchange snapshot takes 2 hours

Environment:

Exchange 2010 Standalone server
NBU 7.0.1 on master/media server and client
W2008 R2 SP1

Exchange policy with 3 Information Stores in Backup Selection with multiplexing and multistreaming enabled.

Backup starts and snapshots are created on Exchange Client.

bpfis log:

 

12:00:08.142 [9876.17364] <4> bpfis: INF - Preparing freeze of NEW_STREAM0 using snapshot method VSS_Writer.
12:00:08.142 [9876.17364] <4> bpfis: INF - Created mount point C:\Program Files\Veritas\NetBackup\temp\_vrts_frzn_img_NEW_STREAM0_9876
12:00:08.157 [9876.17364] <4> bpfis: INF - Preparing freeze of Microsoft Information Store:\Archive DB3\ using snapshot method VSS_Writer.
12:00:08.157 [9876.17364] <4> bpfis: INF - Created mount point C:\Program Files\Veritas\NetBackup\temp\_vrts_frzn_img_Microsoft Information Store_Archive DB3__9876
12:00:34.335 [9876.17364] <4> bpfis: INF - Preparing freeze of NEW_STREAM1 using snapshot method VSS_Writer.
12:00:34.335 [9876.17364] <4> bpfis: INF - Created mount point C:\Program Files\Veritas\NetBackup\temp\_vrts_frzn_img_NEW_STREAM1_9876
12:00:34.335 [9876.17364] <4> bpfis: INF - Preparing freeze of Microsoft Information Store:\Archive DB9\ using snapshot method VSS_Writer.
12:00:34.335 [9876.17364] <4> bpfis: INF - Created mount point C:\Program Files\Veritas\NetBackup\temp\_vrts_frzn_img_Microsoft Information Store_Archive DB9__9876
12:00:36.363 [9876.17364] <4> bpfis: INF - Preparing freeze of NEW_STREAM2 using snapshot method VSS_Writer.
12:00:36.363 [9876.17364] <4> bpfis: INF - Created mount point C:\Program Files\Veritas\NetBackup\temp\_vrts_frzn_img_NEW_STREAM2_9876
12:00:36.363 [9876.17364] <4> bpfis: INF - Preparing freeze of Microsoft Information Store:\Archive DB10\ using snapshot method VSS_Writer.
12:00:36.363 [9876.17364] <4> bpfis: INF - Created mount point C:\Program Files\Veritas\NetBackup\temp\_vrts_frzn_img_Microsoft Information Store_Archive DB10__9876
12:00:38.438 [9876.17364] <4> bpfis: TRV - snapshot preparation successful
13:50:33.580 [9876.17364] <2> bpfis main: snapshot creation successful
 
 
Have a look at the last two lines - just short of 2 hours between 'snapshot preparation' and 'snapshot creation'.
bpbkar log starts at 13:56.
 
Unfortunately nothing in Event Viewer Application log as the log got recreated last night (first entry about 23:30).
 
Can anyone tell me what is happening in the 2 hours?
Does this delay include database validation?
 
Thanks!
 
 
  • Hi,
    A follow up on my previous post: My customer verified that the MS hotfix was already installed (included in an update).

    And then a little more info which might be useful.

    Although we are running a DAG with two servers the symptoms are pretty much the same as Marianne's.
    However we got a decent performance by disabling the concistency check and using the passive copy for backup of the 4TB (8 databases and 2 public folders). All completed in 5 hours 30 minutes. Backup is to an Windows MSDP and with client side dedupe disabled (I didn't yet try it with client side dedupe enabled).

    To me the symptomps looked like som kind of contention (maybe storage or filesystem) when the snapshot verification was taking place. When it was disabled (which you can't do as it is a standalone) all streams started after few minutes instead of 2-3 hours.

    --jakob;

     



     

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