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ZFS On Linux 0.8.3 Released With Many Fixes

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  • #41
    Ubuntu 20.04, soon to be released, is shipping ZFS 0.8.3

    My personal benchmarks say that it is much slower than ZFS 0.7.x, shipped in Ubuntu 18.04

    The difference is very important, 20% in execution time

    These are my results using two identical virtual machines:

    [email protected]:/vgraid/a# time fio --randrepeat=1 --ioengine=libaio --direct=0 --gtod_reduce=1 --name=test --filename=test --bs=8k --iodepth=64 --size=4G --readwrite=randrw --rwmixread=75 focal 5.4.0-21:

    READ: bw=1911KiB/s (1957kB/s), 1911KiB/s-1911KiB/s (1957kB/s-1957kB/s), io=3068MiB (3217MB), run=1644156-1644156msec
    WRITE: bw=640KiB/s (656kB/s), 640KiB/s-640KiB/s (656kB/s-656kB/s), io=1028MiB (1078MB), run=1644156-1644156msec

    real 27m31.120s
    user 0m20.575s
    sys 1m25.637s




    [email protected]:/vgraid/a# time fio --randrepeat=1 --ioengine=libaio --direct=0 --gtod_reduce=1 --name=test --filename=test --bs=8k --iodepth=64 --size=4G --readwrite=randrw --rwmixread=75

    READ: bw=2390KiB/s (2448kB/s), 2390KiB/s-2390KiB/s (2448kB/s-2448kB/s), io=3068MiB (3217MB), run=1314288-1314288msec
    WRITE: bw=801KiB/s (820kB/s), 801KiB/s-801KiB/s (820kB/s-820kB/s), io=1028MiB (1078MB), run=1314288-1314288msec

    real 21m59.117s
    user 0m19.986s
    sys 0m55.836s


    Do Phoronix will publish a scientific comparison among the two ?

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