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.Roos@xxxxxxxxxxxxxxxxx> 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.
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