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    Subject[MMTests] Sysbench read-only on ext4
    Configuration:	global-dhp__io-sysbench-large-ro-ext4
    Result: http://www.csn.ul.ie/~mel/postings/mmtests-20120424/global-dhp__io-sysbench-large-ro-ext4
    Benchmarks: sysbench

    Summary
    =======

    Looking better in places than ext3 but still of concern.

    Benchmark notes
    ===============

    mkfs was run on system startup. No attempt was made to age it. No
    special mkfs or mount options were used.

    sysbench is an OLTP-like benchmark. The test type was "complex" and
    read-only. The table size was 50,000,000 rows regardless of memory size
    but far exceeds the memory size of any of the test machines. sysbench
    was chosen because it's a reasonably complex OLTP-like benchmark with
    straight-forward prerequisites.

    The backing database was postgres.

    ===========================================================
    Machine: arnold
    Result: http://www.csn.ul.ie/~mel/postings/mmtests-20120424/global-dhp__io-sysbench-large-ro-ext4/arnold/comparison.html
    Arch: x86
    CPUs: 1 socket, 2 threads
    Model: Pentium 4
    Disk: Single Rotary Disk
    ===========================================================

    sysbench
    --------
    Generally regresssed.

    Swapping for kernels 3.1 and 3.2 is very high.

    ==========================================================
    Machine: hydra
    Result: http://www.csn.ul.ie/~mel/postings/mmtests-20120424/global-dhp__io-sysbench-large-ro-ext4/hydra/comparison.html
    Arch: x86-64
    CPUs: 1 socket, 4 threads
    Model: AMD Phenom II X4 940
    Disk: Single Rotary Disk
    Status: Ok
    ==========================================================

    sysbench
    --------
    For low number of clients, this has generally improved.

    Swapping in kernel 3.1 was high.

    ==========================================================
    Machine: sandy
    Result: http://www.csn.ul.ie/~mel/postings/mmtests-20120424/global-dhp__io-sysbench-large-ro-ext4/sandy/comparison.html
    Arch: x86-64
    CPUs: 1 socket, 8 threads
    Model: Intel Core i7-2600
    Disk: Single Rotary Disk
    Status:
    ==========================================================

    Generally this is telling a much better story but this could be because
    of the much larger memory size of this machine offsetting some other
    regression.

    Swapping in 3.1 and 3.2.

    --
    Mel Gorman
    SUSE Labs


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