Your Opinion - Disk
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Thread: Your Opinion - Disk

  1. #1
    Join Date
    Dec 2001
    Location
    Keene, NH
    Posts
    510

    Your Opinion - Disk

    (9.2 on Solaris)
    Our disk configuration is as follows. We have 2 logical disks each consisting of 4 physical disks configured with RAID5.

    /d01
    user_data.dbf
    tools.dbf
    hk_data.dbf
    temp_01.dbf
    redo01a.log
    system_01.dbf
    stage_data.dbf
    wms_index.dbf
    undotbs_01.dbf
    redo02b.log
    control_01.ctl

    /d02
    redo01b.log
    stage_index.dbf
    wms_data.dbf
    redo02a.log
    control_02.ctl

    And a third single disk for /archive. What my sys admin and I want to do is reconfigure the disk pool (Sun T3) to 4 RAID0+1 disks and purchase another T3. In this way we go from a 3 disk system to a 9 disk system (two 4 RAID 0+1 disks and /archive disk). I am also aware that it is critcal to get the redo logs off of RAID5.

    Can you please share your thoughts on my current situation (disk crowding) and my new direction so that I may learn better.
    Thank you!

  2. #2
    Join Date
    Nov 2000
    Location
    greenwich.ct.us
    Posts
    9,092
    More disks == better perfomance.

    The 0+1 filesystems will definitely do better than the RAID 5 filesystems, especially if they are spread out on two controllers. As you know, redo on RAID 5 is bad news. Also, I would put your ORACLE Software and TEMP on the single disk and not archive. IMHO, archive is much too important to be NOT protected.

    T3's use Hardware RAID, right? Even so, SW RAID and 0+1 will be better than SW RAID 5 anyday.
    Jeff Hunter
    marist89@yahoo.com
    http://marist89.blogspot.com/
    Get Firefox!
    "I pledge to stop eating sharks fin soup and will not do so under any circumstances."

  3. #3
    As for raid5, I have a question:
    If i have 8 disks, one configuration is for raid5, another option is for raid10.
    For the performance of read operation(read mostly), which configuration will give better performance? According to your experience?
    www.cnoug.org

  4. #4
    Join Date
    Dec 2000
    Location
    Ljubljana, Slovenia
    Posts
    4,439
    Read operations on RAID5 and RAID10 are more or less equal performance-wise.
    Jurij Modic
    ASCII a stupid question, get a stupid ANSI
    24 hours in a day .... 24 beer in a case .... coincidence?

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