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Ceph performance

1 байт добавлено, 19:37, 24 июля 2019
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→‎Test your disks
* Peak parallel random read: {{Cmd|1=fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=128 -rw=randread -runtime=60 -filename=/dev/sdX}}
* Single-threaded read latency: {{Cmd|1=fio -ioengine=libaio -sync=1 -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=1 -rw=randread -runtime=60 -filename=/dev/sdX}}
* Peak parallel random readwrite: {{Cmd|1=fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=128 -rw=randwrite -runtime=60 -filename=/dev/sdX}}
* Journal write latency: {{Cmd|1=fio -ioengine=libaio -sync=1 -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=1 -rw=write -runtime=60 -filename=/dev/sdX}}. Also try it with <tt>-fsync=1</tt> instead of <tt>-sync=1</tt> and write down the worst result, because sometimes one of sync or fsync is ignored by messy hardware.
* Single-threaded random write latency: {{Cmd|1=fio -ioengine=libaio -sync=1 -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=1 -rw=randwrite -runtime=60 -filename=/dev/sdX}}