Now to go for "apples to apples" either run
fio -ioengine=libaio -name=test -bs=4k -iodepth=1 -direct=1 -fsync=1
-rw=randwrite -runtime=60 -filename=/dev/nvmeXXXXXXXXX
to compare with the single-threaded RBD random write result (the test is
destructive, so use a separate partition without data)
...Or run
fio -ioengine=rbd -name=test -bs=4M -iodepth=32 -rw=write -runtime=60
-pool=kube -rbdname=bench
to compare with your dd's linear write result.
58 single-threaded random iops for NVMes is pretty sad either way. Are
you NVMe's server ones? Do they have capacitors? :) in the response to a
likely question about what they are I'll just post my link here again :)
https://yourcmc.ru/wiki/Ceph_performance
--
Vitaliy Filippov
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