IO Performance - expert view

Discussion in 'Solaris, Nexenta, OpenIndiana, and napp-it' started by methos, Sep 12, 2014.

  1. methos

    methos New Member

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    Running Napp-IT (thanks Gea), I'm curious on the thoughts on the following DD Benchmark?




    Memory size: 32767 Megabytes

    write 12.8 GB via dd, please wait...
    time dd if=/dev/zero of=/ISCSI/dd.tst bs=2048000 count=6250

    6250+0 records in
    6250+0 records out
    12800000000 bytes transferred in 56.746088 secs (225566209 bytes/sec)

    real 56.7
    user 0.0
    sys 33.3

    12.8 GB in 56.7s = 225.75 MB/s Write

    wait 40 s
    read 12.8 GB via dd, please wait...
    time dd if=/ISCSI/dd.tst of=/dev/null bs=2048000

    6250+0 records in
    6250+0 records out
    12800000000 bytes transferred in 11.158697 secs (1147087338 bytes/sec)

    real 11.2
    user 0.0
    sys 10.8

    12.8 GB in 11.2s = 1142.86 MB/s Read

    ///////////////////////////////////

    pool: ISCSI
    state: ONLINE
    scan: none requested
    config:

    NAME STATE READ WRITE CKSUM CAP Product
    ISCSI ONLINE 0 0 0
    mirror-0 ONLINE 0 0 0
    c10t50000C0F01299476d0 ONLINE 0 0 0 600.1 GB WD6001HKHG-02VUC
    c9t50000C0F01BF37FEd0 ONLINE 0 0 0 900.2 GB WD9001HKHG-02VUC
    mirror-1 ONLINE 0 0 0
    c11t50000C0F01DE3792d0 ONLINE 0 0 0 600.1 GB WD6001HKHG-02VUC
    c8t50000C0F02CF836Ad0 ONLINE 0 0 0 600.1 GB WD6001BKHG-02D22
    mirror-2 ONLINE 0 0 0
    c12t50000C0F01DE37AEd0 ONLINE 0 0 0 600.1 GB WD6001HKHG-02VUC
    c7t50000C0F02795142d0 ONLINE 0 0 0 600.1 GB WD6001BKHG-02D22
    mirror-3 ONLINE 0 0 0
    c5t50000C0F02792D2Ad0 ONLINE 0 0 0 600.1 GB WD6001BKHG-02D22
    c6t50000C0F02795CE6d0 ONLINE 0 0 0 600.1 GB WD6001BKHG-02D22
    logs
    c1t1d0 ONLINE 0 0 0 120 GB INTEL SSDSC2BB12

    errors: No known data errors
     
    #1
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