It will automatically spill over to the slower storage if necessary; it's better to have some fast storage for the DB than just slow storage. Paul 2018-08-20 13:07 GMT+02:00 Harald Staub <harald.staub@xxxxxxxxx>: > As mentioned here recently, the sizing recommendations for BlueStore have > been updated: > http://docs.ceph.com/docs/master/rados/configuration/bluestore-config-ref/#sizing > > In our ceph cluster, we have some ratios that are much lower, like 20GB of > SSD (WAL and DB) per 7TB of spinning space. This stems from the fact that it > started much earlier, with sizing done with filestore based OSDs in mind > (SSDs for journals), that were converted to BlueStore later. > > So SSD space is much lower than recommended, but much higher than needed for > WAL only. Would it still be better to remove the DB from SSD? Or what > problems could arise with our current setup? Up to now (several months), we > do not see any disadvantages. > > Harry > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com -- 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 _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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