The effects of WITNESS and INVARIANTS

From: Willem Jan Withagen (wjw_at_withagen.nl)
Date: 02/24/04

  • Next message: Robert Watson: "Re: The effects of WITNESS and INVARIANTS" 
    To: <current@FreeBSD.ORG>
Date: Tue, 24 Feb 2004 19:43:11 +0100

    Hi,

    Just out of curriousity, and 'cause I've got some idle boxes, I started to do
    some (NFS-)performance testing.
    There is still a long way to go, but I've but a first obvious result online
    running on the local server disk.

    It makes the claims of the effects of WITNESS and INVARIANTS very obvious.
    Look especially at the graph for "Sequential block read".

    You might want to have a look at:
        http://withagen.dyndns.org/FreeBSD/nfs-performance/index.html.
    Note that no NFS data is included.
    I have some Bonnie-NFS data, but need to write accompanying test and conclusions
    for it.

    Suggestions are more than welcomed.

    --WjW

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