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Thread: Lsi Megaraid Sata Ii 300x-8

  1. #1

    Post Lsi Megaraid Sata Ii 300x-8

    Hi,

    I've very poor performance with my OPEN-E ISCSI. Manual copy of files with different size brings only 14 MB/s and Backup of 684 GB to ISCSI Target needs 18 hours to complete.

    My hardware:
    Supermicro Board X6DH8-XG2
    LSI Megaraid Sata II 300X-8LP 128 MB Cache (w/o Battery)
    8GB RAM
    2 x XEON 2,8 GHz
    6 x 1 TB Seagate ES2 as HW-Raid 5
    2 x Dualport INTEL PRO 1000 Server NIC in Round-rr bonding
    1 Target with 4 TB (File I/O)

    I tried several settings an tuning options but nothing happend, the performance is never better than 22 MB/s.

    Has anybody similar configuration or any tips for tuning my config? Is the Controller my bottleneck and if so, what Controller should be used??

    Thanks

  2. #2

    Default

    Do you have cache enabled in the raid controller, Have you enabled WB in the luns.
    What do you get for disk write speed (hdparm) in the logs
    I have been getting better results with MPIO than with bonding.
    Have you checked your host or iSCSI initator settings to rule them out.

  3. #3

    Default

    Hi,

    yes cache is enabled on controller and WB on luns.

    hdparm report:
    *-----------------------------------------------------------------------------*
    hdparm -t /dev/sda
    *-----------------------------------------------------------------------------*
    /dev/sda:
    Timing buffered disk reads: 56 MB in 3.06 seconds = 18.27 MB/sec
    *-----------------------------------------------------------------------------*
    hdparm -t /dev/sdb
    *-----------------------------------------------------------------------------*
    /dev/sdb:
    Timing buffered disk reads: 408 MB in 3.00 seconds = 135.88 MB/sec
    *-----------------------------------------------------------------------------*
    hdparm -t /dev/sdc
    *-----------------------------------------------------------------------------*
    /dev/sdc:
    Timing buffered disk reads: 128 MB in 3.04 seconds = 42.16 MB/sec
    *-----------------------------------------------------------------------------*
    hdparm -t /dev/sdd
    *-----------------------------------------------------------------------------*
    /dev/sdd:
    Timing buffered disk reads: 98 MB in 3.00 seconds = 32.64 MB/sec

    On another testmachine with only softwareraid 5 and older harddisks, i got this hdparm:
    /dev/md0:
    Timing buffered disk reads: 512 MB in 3.00 seconds = 170.47 MB/sec

  4. #4

    Default

    Check you Raid controller config should be getting better disk reads.
    What are you getting in ifconfig for the NIC's , are you dropping any packets?
    can we see your iscsi deamon properties

  5. #5

    Default

    I've done some more testing and here are the results:
    1. change raid controller drivesettings from cached I/O to Direct I/O
    2. delete all targets and create them new using File I/O
    3. delete the bonding

    here is the hdparm:

    *-----------------------------------------------------------------------------*
    hdparm -t /dev/sdb
    *-----------------------------------------------------------------------------*
    /dev/sdb:
    Timing buffered disk reads: 844 MB in 3.01 seconds = 280.80 MB/sec
    *-----------------------------------------------------------------------------*
    hdparm -t /dev/sdc
    *-----------------------------------------------------------------------------*
    /dev/sdc:
    Timing buffered disk reads: 800 MB in 3.00 seconds = 266.25 MB/sec
    *-----------------------------------------------------------------------------*
    hdparm -t /dev/sdd
    *-----------------------------------------------------------------------------*
    /dev/sdd:
    Timing buffered disk reads: 822 MB in 3.00 seconds = 273.76 MB/sec

    Is there anything else i can do to speed up my system?

    What about the tuning options in open-e? I've read that there can be done by changing some parameters.

  6. #6

    Default

    I forgot:
    *-----------------------------------------------------------------------------*
    ifconfig -a
    *-----------------------------------------------------------------------------*

    eth0 Link encap:Ethernet HWaddr 00:30:48:79:5E0
    inet addr:10.0.0.200 Bcast:10.0.0.255 Mask:255.255.255.0
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:669244 errors:0 dropped:0 overruns:0 frame:0
    TX packets:5744245 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:948912030 (904.9 MiB) TX bytes:419638425 (400.1 MiB)
    Base address:0x3000 Memory:dd300000-dd320000

    eth1 Link encap:Ethernet HWaddr 00:30:48:79:5E1
    inet addr:10.0.0.201 Bcast:10.0.0.255 Mask:255.255.255.0
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:8576954 errors:0 dropped:0 overruns:0 frame:0
    TX packets:626987 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:4282156554 (3.9 GiB) TX bytes:78363728 (74.7 MiB)
    Base address:0x3040 Memory:dd320000-dd340000

    eth2 Link encap:Ethernet HWaddr 00:04:23:AF:2F:00
    inet addr:10.0.0.202 Bcast:10.0.0.255 Mask:255.255.255.0
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:5981255 errors:0 dropped:0 overruns:0 frame:0
    TX packets:627633 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:367457688 (350.4 MiB) TX bytes:79418583 (75.7 MiB)
    Base address:0x4000 Memory:dd640000-dd660000

    eth3 Link encap:Ethernet HWaddr 00:04:23:AF:2F:01
    inet addr:10.0.0.203 Bcast:10.0.0.255 Mask:255.255.255.0
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:720098 errors:0 dropped:0 overruns:0 frame:0
    TX packets:627016 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:1033922350 (986.0 MiB) TX bytes:78329063 (74.7 MiB)
    Base address:0x4040 Memory:dd660000-dd680000

    my ifconfig seems to be ok, no dropped packets.

  7. #7

    Default

    Try these settings

    maxRecvDataSegmentLen=262144
    MaxBurstLength=16776192
    Maxxmitdatasegment=262144
    maxoutstandingr2t=8
    InitialR2T=No
    ImmediateData=Yes

  8. #8

    Default

    Tried all but is always slow. How can i set up MPIO? Is there a How-To ?

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