You already have a thread talking about benchmarking the addition of WAL and DB partitions to an OSD. Why are you creating a new one about the exact same thing? As with everything, the performance increase isn't even solely answerable by which drives you have, there are a lot of factors that could introduce a bottleneck in your cluster. But again, why create a new thread for the exact same topic?
On Wed, Sep 12, 2018 at 12:06 PM Marc Roos <m.r...@f1-outsourcing.eu> wrote: > > When having a hdd bluestore osd with collocated wal and db. > > > - What performance increase can be expected if one would move the wal to > an ssd? > > - What performance increase can be expected if one would move the db to > an ssd? > > - Would the performance be a lot if you have a very slow hdd (and thus > not so much when you have a very fast hdd (sas 15k)) > > - It would be best to move the wal first to the ssd, and then maybe also > the db? > > In this CERN video (https://youtu.be/OopRMUYiY5E?t=931) of 2015 they are > talking about 5-10x increase etc. But that is filestore of course. > > > > > > > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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