Greetings,

I posted a related message about this the other day with respect to backing
up a Veritas catalog that was mounted via NFS from a NetApp filer. I can
confirm that this results in extremely low performance. It appears that the
NetApp does not stream data from the filer via NFS at all well. I'm going to
call NetApp in a bit an see what advice they can provide on this.

We are running NDMP and see much better throughput. That's definitely a win.
Be aware that Veritas does not support all of the NDMP features and in
particular is missing the option that allows rapid recovery of files from
the middle of a dump. (The name of the feature escapes me at the moment.)
You need to walk through the entire dump to find the file and cannot use an
index to seek to the appropriate location and then start the restore. This
will not be fixed in the next release but should be fixed in the release
coming out at the end of 2002.


-David


-----Original Message-----
From: Kyle Meyer [mailto:kmeyer AT banderacom DOT com]
Sent: Friday, January 04, 2002 8:54 AM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Performance issues of Netapp->RH 7.1 via
NFS->Win2k Media Server


I have a Win2k Master/Media server that is backing up a NetApp via an NFS
mount on a RedHat 7.1 box. I have had others tell me that backing up via NFS
(especially on linux) is going to give me poor performance regardless of
what I do. I have managed to get a total of 18-25MB/s total out of 3 streams
coming from the box, and I am soon to begin the performance tuning of the RH
box to up the throughput. Has anyone gone through a similar setup and have
any pointers to give? 

On the hardware side:
The RH box is a PowerEdge 4400 2x733 Xeon w/1GB RAM & GBE, the master a
PowerEdge 2500 2x1Ghz 1GB RAM w/GBE.

Some may say to purchase the NDMP module for NBU, I would prefer to not have
to split my library to connect to the NetApp.

Thanks for any help, 
Kyle Meyer
-----------------
Network Administrator
Banderacom, Inc
(512) 493-3256
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