Re: some simple nfs-benchmarks on 5.4 RC2
From: Eric Anderson (anderson_at_centtech.com)
Date: 04/19/05
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Date: Tue, 19 Apr 2005 08:30:04 -0500 To: Claus Guttesen <kometen@gmail.com>
Claus Guttesen wrote:
>>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=/dev/zero of=/nfssrv/dd.tst bs=1024 count=1048576
>
> 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.
What state is nfsd in? Can you send the output of this:
ps -auxw|grep nfsd
while the server is slammed?
I think you are disk bound.. You should not be disk bound at this point with a
good RAID controller..
Eric
-- ------------------------------------------------------------------------ Eric Anderson Sr. Systems Administrator Centaur Technology A lost ounce of gold may be found, a lost moment of time never. ------------------------------------------------------------------------ _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "freebsd-performance-unsubscribe@freebsd.org"
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