SCSI Bus tuning.

From: Gary Stanley (gary_at_outloud.org)
Date: 07/05/03

  • Next message: Alexander Leidinger: "Re: linux-HA" 
    Date: Sat, 05 Jul 2003 02:34:05 -0400
To: freebsd-performance@freebsd.org

    Hiya.

    With Adaptec 2120S Raid Controllers (PCI-X 66mhz) and 5 or 6 Ultra320 RAID5
    drives, what's the maximum data rate I could achieve on the array? It
    currently seems to max out around 30mbyte/s with a small amount of burst.

      procs memory page disks faults cpu
      r b w avm fre flt re pi po fr sr aa0 md0 in sy cs us sy id
      0 8 0 264040 75156 83 3 0 0 8321 8310 0 0 8251 23037 2613
    14 58 28
      6 2 0 265680 85652 80 0 0 0 8375 10985 651 0 8477 177349 3938
    14 62 24
      6 2 0 265780 95692 20 0 0 2 8419 11011 651 0 8426 201621 3493
    12 62 26

           tty aacd0 acd0 fd0 cpu
      tin tout KB/t tps MB/s KB/t tps MB/s KB/t tps MB/s us ni sy in id
        0 2 0.00 0 0.00 0.00 0 0.00 0.00 0 0.00 14 0 33 25 28
        0 77 51.71 637 32.18 0.00 0 0.00 0.00 0 0.00 7 0 26 24 43
        0 76 51.38 656 32.94 0.00 0 0.00 0.00 0 0.00 9 0 27 25 39
        0 76 51.85 616 31.18 0.00 0 0.00 0.00 0 0.00 8 0 26 26 39
        0 76 51.56 636 32.01 0.00 0 0.00 0.00 0 0.00 6 0 22 24 47

    ITEM SIZE LIMIT USED FREE REQUESTS

    PIPE: 160, 0, 4, 98, 20542
    SWAPMETA: 160, 233016, 19, 57, 12493
    unpcb: 160, 0, 46, 54, 21349
    ripcb: 192, 131070, 0, 42, 5
    syncache: 160, 15359, 8, 273, 2099188
    tcpcb: 576, 131070, 3956, 2664, 1970515
    udpcb: 192, 131070, 6, 36, 243
    socket: 192, 131070, 4008, 2690, 1992113
    DIRHASH: 1024, 0, 471, 377, 3917
    KNOTE: 64, 0, 6882, 2782, 3950885
    NFSNODE: 352, 0, 647, 849, 2379
    NFSMOUNT: 544, 0, 2, 12, 2
    VNODE: 192, 0, 34216, 22, 34216
    NAMEI: 1024, 0, 0, 32, 22168837
    VMSPACE: 192, 0, 45, 83, 38265
    PROC: 416, 0, 51, 47, 38271
    DP fakepg: 64, 0, 0, 0, 0
    PV ENTRY: 28, 2690702, 140870, 383281, 23461659
    MAP ENTRY: 48, 0, 3633, 5760, 3394017
    KMAP ENTRY: 48, 64455, 233, 151, 83750
    MAP: 108, 0, 7, 3, 7
    VM OBJECT: 92, 0, 32805, 99, 595113

    If it helps any, Dual Xeon 2.0ghz procs, 2 gigs of ram, supermicro board, etc.

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  • Next message: Alexander Leidinger: "Re: linux-HA"

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