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Date: Tue, 19 Apr 2005 15:14:44 +0200
From: Claus Guttesen <kometen@gmail.com>
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cc: freebsd-performance@freebsd.org
Subject: Re: some simple nfs-benchmarks on 5.4 RC2
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> What does gstat look like on the server when you are doing this?
> Also - does a dd locally on the server give the same results?  You should=
 get
> about double that I would estimate locally direct to disk.  What about a =
dd over
> NFS?

dd-command:

dd if=3D/dev/zero of=3D/nfssrv/dd.tst bs=3D1024 count=3D1048576

on client:
1073741824 bytes transferred in 24.787112 secs (43318553 bytes/sec)
gstat showed approx. 30.000-52.000 KB/s.

on nfs-server:
1073741824 bytes transferred in 23.368815 secs (45947637 bytes/sec)
gstat showed approx. 45.000-46.000 KB/s.

The funny thing is that the outputrate fluxuates more dd'ing from the
client (remote) and is more consistent dd'ing on the server (locally).

> What is the server spending its time doing? (top?)

nfsd.

> If you are looking for the best performance, you might try a RAID 0+1 (or=
 10
> possibly) instead of RAID 5.

I chosed raid 5 to maximize space.

regards
Claus