[Veritas-bu] NBU 6.5.6 client on FreeBSD 7.2 host

2010-09-10 12:23:10
Subject: [Veritas-bu] NBU 6.5.6 client on FreeBSD 7.2 host
From: Nate Sanders <sandersn AT dmotorworks DOT com>
To: "veritas-bu AT mailman.eng.auburn DOT edu" <veritas-bu AT mailman.eng.auburn DOT edu>
Date: Fri, 10 Sep 2010 11:22:11 -0500
Now that we made it to 6.5.6 we're able to start testing NFS performance
from our NetApp VS NDMP. For the longest time we've done the backup of
some 1 billion small image files off the NetApp via NDMP. This job
usually took 1-3 weeks to complete a full sweep via NDMP.

Since we have support for FBSD we thought we would try doing NFS via
that client as Linux NFS is not as powerful as the BSD/Solaris variety.
Well on our initial test of a small volume from the NetApp, we're seeing
2-4MB/s performance. Confirmed via bptm log. This is going straight to
LTO4 tape, which usually backs up around 150MB/s. Logs show that the
previous NDMP jobs from the NetApp we're doing around 40MB/s direct to
two dedicated NDMP LTO4 drives.

Supposedly multiplexing for NDMP will come to NBU 7.x shortly and we
will test again with that in the future. Right now I am not multiplexing
this NFS job but while looking in bptm I don't see the usual "waited for
buffer" errors that would tell me that I _should_ increase it. Is it
still likely multiplexing would increase the overall performance here?
Is this a known issue with FBSD clients? Is there something else I
should be looking at?

Nate Sanders            Digital Motorworks
System Administrator      (512) 692 - 1038

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