This workload is probably bottlenecked by rocksdb (since the small writes are buffered there), so that's probably what needs tuning here. Paul -- Paul Emmerich Looking for help with your Ceph cluster? Contact us at https://croit.io croit GmbH Freseniusstr. 31h 81247 München www.croit.io Tel: +49 89 1896585 90 On Tue, Mar 5, 2019 at 9:29 AM Stefan Priebe - Profihost AG <s.priebe@xxxxxxxxxxxx> wrote: > > Hello list, > > while the performance of sequential writes 4k on bluestore is very high > and even higher than filestore i was wondering what i can do to optimize > random pattern as well. > > While using: > fio --rw=write --iodepth=32 --ioengine=libaio --bs=4k --numjobs=4 > --filename=/tmp/test --size=10G --runtime=60 --group_reporting > --name=test --direct=1 > > I get 36000 iop/s on bluestore while having 11500 on filestore. > > Using randwrite gives me 17000 on filestore and only 9500 on bluestore. > > This is on all flash / ssd running luminous 12.2.10. > > Greets, > Stefan > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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