16.12.2014 10:53, Daniel Schwager пишет: > Hallo Mike, > >> This is also have another way. >> * for CONF 2,3 replace 200Gb SSD to 800Gb and add another 1-2 SSD to >> each node. >> * make tier1 read-write cache on SSDs >> * also you can add journal partition on them if you wish - then data >> will moving from SSD to SSD before let down on HDD >> * on HDD you can make erasure pool or replica pool > > Do you have some experience (performance ?) with SSD as caching tier1? Maybe > some small benchmarks? From the mailing list, I "feel" that SSD-tearing is > not much used in productive. > > regards > Danny > >
No. But I think it's better than using SSD only for journals. Looks on StorPool or Nutanix (in some way) - they used SSD as a storage/long life cache as a storage. Cache pool tiering it's a new feature in Ceph introducing in Firefly. It's explain why cache tiering by now haven't used in production. _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
