Here's a couple of things if you're not using the dd as a vtl and you're going 
over ip and not fiber between your backup servers and the dd box:
1) Better to have two data domain devices (through networker) writing max 
sessions of 6 than it is to have one data domain device writing max sessions of 
12.  Doing this cut down the backup times on one of our groups by half.  I'm in 
the process of testing with some of my groups to see if it's not better to have 
4 data domain devices with a max sessions of 3.
2) Throttle back your group parallelism - if you have two data domain devices 
writing up to 5 sessions each set the group parallelism to 10 that writes to 
these devices.



-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On 
Behalf Of Rankin, Rich
Sent: Monday, April 16, 2012 1:20 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] backup slowness to DD

Hello all,

 

We have a vendor in setting up a new DataDomain environment.  We have a
DD860 as the primary and a DD640 as the secondary.  Everything writes to the 
DD860 during the backup window.  We have a mixed environment of (Unix, Linux, 
Windows (2003/2008)) OS's.  We have Linux and Windows 2003 systems as storage 
nodes.  We are on Networker 7.6.2.  As we implement the new environment, we 
have seen an increase in the time our backups take to disk.  We have some 
backups taking 2X.  Backups with DDBoost do not decrease either.  We have 
implemented a separate backup network as part of the configuration.

 

 

                If you have been through this and have found the magic or have 
some configuration ideas that we should try, we would appreciate your help.  

 

Thanks,

 

Rich

 

 

 

 

 


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