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Backup Exec 12.5 Exchange Agent Slow

Posted on 2010-01-06
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I have a backup server running BE 12.5 with the Exchange agent loaded.  When I setup a job to backup the information store on the Exchange server using the agent, it only reaches a max speed of 100MB/Min, which takes all day.  

To verify that the network wasn't the issue I did a local backup of Exchange and then copied to the backup file over from our Exchange server to our backup server.  That only took an hour to transfer the 40GB, so I know that the network isn't the issue.  

This is Exchange 2003 and there are just a couple stores for a total of 40GB. It takes about 7 hours to backup right now with BE.
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Question by:jpletcher1
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Expert Comment

by:tbsgadi
ID: 26197925
Have a look at the following:
http://geeksend.com/backup-exec-slow-backup

Gary
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Author Comment

by:jpletcher1
ID: 26201461
I don't have any AV installed on the server, so I don't think this is the issue.
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by:tbsgadi
ID: 26201794
Maybe you have a virus?
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LVL 28

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by:honmapog
ID: 26202579
Is the backup consistently running at 100MB/min, all throughout the job. Or does it start off fat and slow down? If it slows down near the end, try disabling the Granular Restore Option from the Microsoft Exchange section of the job definition
Please confirm that you're only backing up the resource called "Microsoft Information Store", and that you're not backing up Microsoft Exchange mailboxes.

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by:jpletcher1
ID: 26204495
The backup starts at about 40mb/min and then crawls up to a little over 100 and runs there constantly.  I don't see an option in the selection list to do individual mailboxes, just entire stores.  I have tried with and without the GRT option on and that doesn't make a difference.  
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by:honmapog
ID: 26204922
I don't know if you back up other data to the same destination (tape or disk). If you're backing up to disk, check the fragmentation level of the disk where the B2D device is located.
Are file-level backups of your Exchange server fast? Make sure they go to the same destination device if you're comparing.
Has this problem always existed or did this used to work fast before?
Make sure you Exchange maintenance period does not collide with the backup window.

Personally I would also check the network again. I know the copy of the backup file worked fine, but I wouldn't rule out the network. The protocols used in both transfers are a bit different as well.
Make sure speed and duplex settings are the same on the NIC and the corresponding switch port. Do not mix AutoNegotiation on one side with fixed settings on the other side.
I would disable RSS and TOE on your network cards on both sides. Also check http://support.microsoft.com/kb/948496 for Windows 2003 or http://support.microsoft.com/kb/951037 for Windows 2008.
Check MTU sizes across the network. Make sure they are consistent. Make sure you've not configured Jumbo Frames on one side while not using them on the other side.
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by:jpletcher1
ID: 26212191
Checked all these network settings and they are fine.

I hadn't been using this before so the problem didn't just start, it just doesn't work well right now that I started.

I backed up the C: drive with about 12GB of system data and that ran at over 600mb/min.  Then I changed the selection list to do the Exchange stores instead of the C: drive and again it only runs at 100mb/min tops.  Seems to have something to do specifically with the Exchange agent backup.  I ran these backups to the same destination drives as well so that's not the issue.

Thanks for the advice and let me know if you have any further suggestions.
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by:jpletcher1
ID: 26213082
Ok, got a little further.  It seems like if I run the backup without the GRT option it backs up way faster, between 600-800mb/min.  Once I enable GRT then it never gets above 100mb/sec.  I wonder if this is a known issue or has a resolution?
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Accepted Solution

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jpletcher1 earned 0 total points
ID: 26214462
I found this article..

http://seer.entsupport.symantec.com/docs/289271.htm

Tried running it to tape directly on the same server that I was sending it to disk on, and it runs at over 3,000mb/sec instead of the 100mb/sec on disk.  I will have to look at this article more closely, but for now I think I'll just send it to tape as it is 30x faster!

Thanks
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by:honmapog
ID: 26266973
jpletcher1 - are these not the recommendatons I made? If you're backing up to disk, chances are you disk is very fragmented. Also I advised taking off GRT in my first post. I'm puzzled why you're closing saying you found your own solution.
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Author Comment

by:jpletcher1
ID: 26287356
Simply finding that doing the backup without GRT to disk was faster wasn't a solution as much as it was troubleshooting.  In the end, the solution that got my backups working fast and with the GRT option enabled was going directly to tape, and I don't recall seeing that in these posts.

I eliminated the network as the issue as well as fragmented disk.  I also eliminated the backup running during the Exchange maintenance period.  Those were good things to check and I do thank you for going into detail on them, but they were not the solutions.  If you can help figure out why backing up to disk is so slow with GRT enabled (knowing that I have tried the things you mentioned) then I would be more than happy to award the points.

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