Re: some simple nfs-benchmarks on 5.4 RC2

From: Claus Guttesen (kometen_at_gmail.com)
Date: 04/20/05

  • Next message: Claus Guttesen: "Re: some simple nfs-benchmarks on 5.4 RC2" 
    Date: Wed, 20 Apr 2005 10:17:31 +0200
To: Eric Anderson <anderson@centtech.com>

    > >>I think you are disk bound.. You should not be disk bound at this point with a
    > >>good RAID controller..
    > > Good point, it's an atabeast from nexsan.
    > Looks like they are indeed waiting on disk.. You could try making two 6 disk
    > raid5 in your controller, then striping those with vinum. That might help.
    > Possibly, if your controller supports it, setting up the array as JBOD, and then
    > use vinum to build your raid 5 (not sure if it will be faster or not).

    I had a raid 5 volume with 5 disks (1.6 TB) and did the same dd:

    elin% dd if=/dev/zero of=/nfssrv/dd.tst bs=1024 count=1048576
    1048576+0 records in
    1048576+0 records out
    1073741824 bytes transferred in 21.373114 secs (50237968 bytes/sec)

    The dd on the other raid-volume (12 disks) did also comlete in approx.
    22 sec. So no difference when I lower the number of disks in an array.

    Frame size on the storage-device is 2112 (bytes).

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

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