Dedup Job Very slow

[mmattmann]

Hi

First some facts about the server:

Windows 2008 R2 Enterprise SP1, Backup Exec 2012 - fully patched, MS Hotfix 979612 and 982383 installed.

Windows firewall an AV software disabled (Server and Client)

Intel Xeon E5520 2,27GHz, 4 Cores

24 GB RAM

RAID 6, 12 * 2 TB on Adaptec 5405

NIC Teaming with 2 x Intel 82567

The problem is the job rate to a B2D dedub folder. If I do backups to a "normal" B2D folder I get job rates around 2000 MB/Min. The same server to a dedup folder ond the same partition is something around 20 MB/Min. There is no difference with client side or server side deduplication.

What I allready tried:

LAN without teaming - no difference

Concurent jobs - no difference

Backup of media server - no difference

Any Ideas?

[pkh]

Have you tried disabling checkpoint/restart?

Backup performance in Backup Exec 2012 can be slower than previous versions

[Kiran_Bandi]

Have a look at this TN and see if that helps: http://www.symantec.com/docs/TECH188680

[pkh]

If you are recommending that he disables the RAID caching for volume where is dedup folder resides, then it is going slow things down some more.

That said, RAID caching should be turned off for the volume where the dedup folder resides.

[Kiran_Bandi]

I hope you know what you just said. 

If i am not wrong Your both statements are contrasting.....

If you are recommending that he disables the RAID caching for volume where is dedup folder resides, then it is going slow things down some more.

RAID caching should be turned off for the volume where the dedup folder resides.

I tried, but couldn't understand what you meant here...

[pkh]

So what is your recommendation when you make your previous post?  To enable or disable disk caching?

[Kiran_Bandi]

If it is enabled disbale it. And i asked the OP to refer the TN where it is clearly mentioned why it is recommended to disable. By quoting that TN i can't ask OP to enable it right?

[pkh]

So how is that going to help him?  His jobs is already slow.  By disabling caching it is going to slow down some more.  Read my previous post carefully.

RAID cache has no relevance to this topic.

If your recommendation is to enable caching to speed things up, then you are going against recommended best practice.

[Kiran_Bandi]

Correct... Now all ur replies to me makes sense.

But unfortunately we (normal users) do not have delete option. 

Thanks....

[mmattmann]

Thank you for your help.

- RAID caching was already disabled.

- Checkpoint restart does not make any difference

[mmattmann]

As we have a bit trouble with this... bump

[jpk]

I face similar issues.  Some jobs go at an ok speed with the dedupe folder, others crawl.  I've not been able to make any determination why this is.