Re: Raid 5 performance

From: Achim Patzner (ap_at_bnc.net)
Date: 02/07/04

  • Next message: Petri Helenius: "Re: Raid 5 performance" 
    Date: Sat, 7 Feb 2004 16:12:58 +0100
To: freebsd-performance@freebsd.org

    Am 07.02.2004 um 10:39 schrieb Uwe Doering:
    >> 1. FreeBSD has a 16k block size. The RAID card is set at 64k
    >> Block size(its sweet spot).

    > A RAID controller normally has nothing to do with the file system's
    > block size. Are you sure that you're not mixing this up with the
    > stripe size?

    He is.

    > Which stripe size to use with a RAID controller depends on your
    > performance priorities.

    I just (painfully) found out that at least for 3ware controllers the
    most important part of getting performance out of them is picking the
    right firmware... Right now we're back at "the more recent the better".

    Did anyone already try the 3ware SATA boards?

    Achim

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  • Next message: Petri Helenius: "Re: Raid 5 performance"