Re: FreeBSD 5.3 I/O Performance / Linux 2.6.10 | Continued Discussion

From: Mike Tancsa (mike_at_sentex.net)
Date: 01/28/05

  • Next message: Robert Watson: "Re: FreeBSD 5.3 I/O Performance / Linux 2.6.10 | Continued Discussion" 
    Date: Thu, 27 Jan 2005 21:47:04 -0500
To: Robert Watson <rwatson@FreeBSD.org>

    At 08:14 PM 27/01/2005, Robert Watson wrote:
    > >
    > > My tests use the exact same disk layout, and hardware. However, I have
    > > had consistent results on all 4 boxes that I have tested on.

    I am redoing mine so that I boot from a different drive and just test on
    one large RAID5 partition so that the layout is as consistent as possible

    >I/O (reads, writes at fairly large multiples of the sector size -- 512k is
    >a good number) and small I/O size (512 bytes is good). This will help
    >identify the source along two dimmensions: are we looking at a basic
    >storage I/O problem that's present even without the file system, or can we
    >conclude that some of the additional extra cost is in the file system code
    >or the hand off to it. Also, with the large and small I/O size, we can
    >perhaps draw some conclusions about to what extent the source is a
    >per-transaction overhead.

    Apart from postmark and iozone (directly to disk and over nfs), are there
    any particular tests you would like to see done ?

    Also, anyone know of a decent benchmark to run on windows ? I want to test
    samba's performance on the 2 platforms as seen from a couple of Windows
    clients.

             ---Mike

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