Re: some simple nfs-benchmarks on 5.4 RC2

From: Claus Guttesen (kometen_at_gmail.com)
Date: 04/19/05

  • Next message: Eric Anderson: "Re: some simple nfs-benchmarks on 5.4 RC2" 
    Date: Tue, 19 Apr 2005 15:14:44 +0200
To: Eric Anderson <anderson@centtech.com>

    > 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.

    regards
    Claus
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  • Next message: Eric Anderson: "Re: some simple nfs-benchmarks on 5.4 RC2"

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