[lkml]   [2008]   [Mar]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: RAID-1 performance under 2.4 and 2.6
    On Tue, Mar 25, 2008 at 7:43 PM, Emmanuel Florac <> wrote:
    > dd if=/dev/zero of=/mountpoint/testfile bs=1M count=1024

    Keep in mind that the above test tests two subsystems at the same
    time: RAID-1 + the filesystem on top of it. If you want to test RAID-1
    performance you should specify a raw device to of=... instead of a
    file (and the direct I/O flags). There are considerable performance
    differences between filesystems for large files. E.g. XFS is a lot
    faster than ext3 for large files (gigabytes).


     \ /
      Last update: 2008-03-26 09:45    [W:0.018 / U:9.376 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site