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Storage Pool Performance Slow

    Question

  • I am new to Azure and trying to setup a server.  I have created a 3 disk storage pool in West Europe region.  The performance of the 3 disk data disk is worse than the OS disk?  Below are tests performed on C: (OS disk) and E: (3 Disk Storage Pool).  I would have expected the 3 disk storage pool to perform much better than the OS disk?  Any help would be greatly appreciated.

    Command Line: Diskspd.exe -b8K -d60 -h -L -o2 -t4 -r -w30 -c50M c:\io.dat

    Input parameters:

    timespan:   1
    -------------
    duration: 60s
    warm up time: 5s
    cool down time: 0s
    measuring latency
    random seed: 0
    path: 'c:\io.dat'
    think time: 0ms
    burst size: 0
    software and hardware write cache disabled
    performing mix test (write/read ratio: 30/100)
    block size: 8192
    using random I/O (alignment: 8192)
    number of outstanding I/O operations: 2
    thread stride size: 0
    threads per file: 4
    using I/O Completion Ports
    IO priority: normal



    Results for timespan 1:
    *******************************************************************************

    actual test time: 60.01s
    thread count: 4
    proc count: 2

    CPU |  Usage |  User  |  Kernel |  Idle
    -------------------------------------------
       0|   2.53%|   0.34%|    2.19%|  97.48%
       1|   1.17%|   0.26%|    0.91%|  98.80%
    -------------------------------------------
    avg.|   1.85%|   0.30%|    1.55%|  98.14%

    Total IO
    thread |       bytes     |     I/Os     |     MB/s   |  I/O per s |  AvgLat  | LatStdDev |  file
    -----------------------------------------------------------------------------------------------------
         0 |       195436544 |        23857 |       3.11 |     397.52 |    5.084 |    30.620 | c:\io.dat (50MB)
         1 |       187621376 |        22903 |       2.98 |     381.62 |    5.254 |    30.861 | c:\io.dat (50MB)
         2 |       194412544 |        23732 |       3.09 |     395.44 |    5.078 |    31.032 | c:\io.dat (50MB)
         3 |       177995776 |        21728 |       2.83 |     362.04 |    5.588 |    38.165 | c:\io.dat (50MB)
    -----------------------------------------------------------------------------------------------------
    total:         755466240 |        92220 |      12.00 |    1536.62 |    5.243 |    32.713

    Read IO
    thread |       bytes     |     I/Os     |     MB/s   |  I/O per s |  AvgLat  | LatStdDev |  file
    -----------------------------------------------------------------------------------------------------
         0 |       136273920 |        16635 |       2.17 |     277.18 |    0.545 |    12.609 | c:\io.dat (50MB)
         1 |       130842624 |        15972 |       2.08 |     266.13 |    0.566 |    14.463 | c:\io.dat (50MB)
         2 |       136863744 |        16707 |       2.17 |     278.38 |    0.463 |     9.707 | c:\io.dat (50MB)
         3 |       124575744 |        15207 |       1.98 |     253.39 |    0.618 |    16.948 | c:\io.dat (50MB)
    -----------------------------------------------------------------------------------------------------
    total:         528556032 |        64521 |       8.40 |    1075.08 |    0.546 |    13.597

    Write IO
    thread |       bytes     |     I/Os     |     MB/s   |  I/O per s |  AvgLat  | LatStdDev |  file
    -----------------------------------------------------------------------------------------------------
         0 |        59162624 |         7222 |       0.94 |     120.34 |   15.540 |    50.737 | c:\io.dat (50MB)
         1 |        56778752 |         6931 |       0.90 |     115.49 |   16.058 |    49.977 | c:\io.dat (50MB)
         2 |        57548800 |         7025 |       0.91 |     117.05 |   16.053 |    53.460 | c:\io.dat (50MB)
         3 |        53420032 |         6521 |       0.85 |     108.66 |   17.177 |    63.179 | c:\io.dat (50MB)
    -----------------------------------------------------------------------------------------------------
    total:         226910208 |        27699 |       3.61 |     461.54 |   16.185 |    54.416


      %-ile |  Read (ms) | Write (ms) | Total (ms)
    ----------------------------------------------
        min |      0.030 |      5.289 |      0.030
       25th |      0.092 |      7.548 |      0.110
       50th |      0.140 |      8.574 |      0.218
       75th |      0.243 |     11.931 |      7.302
       90th |      0.515 |     20.603 |     10.215
       95th |      0.758 |     34.467 |     15.548
       99th |      1.608 |    104.709 |     50.310
    3-nines |     49.128 |    958.782 |    517.863
    4-nines |    943.046 |   1421.212 |   1342.772
    5-nines |   1669.787 |   1585.591 |   1669.787
    6-nines |   1669.787 |   1585.591 |   1669.787
    7-nines |   1669.787 |   1585.591 |   1669.787
    8-nines |   1669.787 |   1585.591 |   1669.787
        max |   1669.787 |   1585.591 |   1669.787


    Command Line: Diskspd.exe -b8K -d60 -h -L -o2 -t4 -r -w30 -c50M e:\io.dat

    Input parameters:

    timespan:   1
    -------------
    duration: 60s
    warm up time: 5s
    cool down time: 0s
    measuring latency
    random seed: 0
    path: 'e:\io.dat'
    think time: 0ms
    burst size: 0
    software and hardware write cache disabled
    performing mix test (write/read ratio: 30/100)
    block size: 8192
    using random I/O (alignment: 8192)
    number of outstanding I/O operations: 2
    thread stride size: 0
    threads per file: 4
    using I/O Completion Ports
    IO priority: normal



    Results for timespan 1:
    *******************************************************************************

    actual test time: 60.01s
    thread count: 4
    proc count: 2

    CPU |  Usage |  User  |  Kernel |  Idle
    -------------------------------------------
       0|   2.27%|   0.49%|    1.77%|  97.74%
       1|   1.25%|   0.26%|    0.99%|  98.76%
    -------------------------------------------
    avg.|   1.76%|   0.38%|    1.38%|  98.25%

    Total IO
    thread |       bytes     |     I/Os     |     MB/s   |  I/O per s |  AvgLat  | LatStdDev |  file
    -----------------------------------------------------------------------------------------------------
         0 |        61333504 |         7487 |       0.97 |     124.76 |   16.027 |    47.542 | e:\io.dat (50MB)
         1 |        63553536 |         7758 |       1.01 |     129.28 |   15.562 |    46.550 | e:\io.dat (50MB)
         2 |        65552384 |         8002 |       1.04 |     133.34 |   14.995 |    43.077 | e:\io.dat (50MB)
         3 |        63029248 |         7694 |       1.00 |     128.21 |   15.595 |    51.451 | e:\io.dat (50MB)
    -----------------------------------------------------------------------------------------------------
    total:         253468672 |        30941 |       4.03 |     515.59 |   15.536 |    47.207

    Read IO
    thread |       bytes     |     I/Os     |     MB/s   |  I/O per s |  AvgLat  | LatStdDev |  file
    -----------------------------------------------------------------------------------------------------
         0 |        42999808 |         5249 |       0.68 |      87.47 |   15.698 |    50.268 | e:\io.dat (50MB)
         1 |        44548096 |         5438 |       0.71 |      90.62 |   15.235 |    48.977 | e:\io.dat (50MB)
         2 |        46039040 |         5620 |       0.73 |      93.65 |   14.743 |    45.938 | e:\io.dat (50MB)
         3 |        44384256 |         5418 |       0.71 |      90.28 |   15.084 |    50.328 | e:\io.dat (50MB)
    -----------------------------------------------------------------------------------------------------
    total:         177971200 |        21725 |       2.83 |     362.02 |   15.182 |    48.874

    Write IO
    thread |       bytes     |     I/Os     |     MB/s   |  I/O per s |  AvgLat  | LatStdDev |  file
    -----------------------------------------------------------------------------------------------------
         0 |        18333696 |         2238 |       0.29 |      37.29 |   16.799 |    40.420 | e:\io.dat (50MB)
         1 |        19005440 |         2320 |       0.30 |      38.66 |   16.327 |    40.281 | e:\io.dat (50MB)
         2 |        19513344 |         2382 |       0.31 |      39.69 |   15.590 |    35.415 | e:\io.dat (50MB)
         3 |        18644992 |         2276 |       0.30 |      37.93 |   16.812 |    54.013 | e:\io.dat (50MB)
    -----------------------------------------------------------------------------------------------------
    total:          75497472 |         9216 |       1.20 |     153.57 |   16.371 |    43.013


      %-ile |  Read (ms) | Write (ms) | Total (ms)
    ----------------------------------------------
        min |      4.984 |      5.400 |      4.984
       25th |      7.409 |      7.585 |      7.465
       50th |      8.802 |      8.921 |      8.839
       75th |     12.011 |     12.891 |     12.262
       90th |     21.018 |     24.415 |     21.918
       95th |     32.918 |     42.856 |     35.041
       99th |     98.706 |    108.648 |    103.843
    3-nines |    850.674 |    669.800 |    823.729
    4-nines |   1529.657 |   1462.462 |   1462.462
    5-nines |   2302.549 |   1462.462 |   2302.549
    6-nines |   2302.549 |   1462.462 |   2302.549
    7-nines |   2302.549 |   1462.462 |   2302.549
    8-nines |   2302.549 |   1462.462 |   2302.549
        max |   2302.549 |   1462.462 |   2302.549

    Sunday, January 10, 2016 10:35 AM

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