On Wed, Aug 14, 2019 at 2:38 PM Olivier AUDRY <olivier@xxxxxxx> wrote: > let's test random write > rbd -p kube bench kube/bench --io-type write --io-size 8192 --io-threads 256 --io-total 10G --io-pattern rand > elapsed: 125 ops: 1310720 ops/sec: 10416.31 bytes/sec: 85330446.58 > > dd if=/dev/zero of=test bs=8192k count=100 oflag=direct > 838860800 bytes (839 MB, 800 MiB) copied, 24.6185 s, 34.1 MB/s > > 34.1MB/s vs 85MB/s .... 34 apples vs. 85 oranges You are comparing 256 threads with a huge queue depth vs a single thread with a normal queue depth. Use fio on the mounted rbd to get better control over what it's doing Paul > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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