Argg !! With 10x10TB SATA DB and 2 SSD disks this would mean 2 TB for each SSD ! If this is really required I am afraid I will keep using filestore ...
Cheers, Massimo On Fri, Oct 5, 2018 at 7:26 AM <c...@elchaka.de> wrote: > Hello > > Am 4. Oktober 2018 02:38:35 MESZ schrieb solarflow99 < > solarflo...@gmail.com>: > >I use the same configuration you have, and I plan on using bluestore. > >My > >SSDs are only 240GB and it worked with filestore all this time, I > >suspect > >bluestore should be fine too. > > > > > >On Wed, Oct 3, 2018 at 4:25 AM Massimo Sgaravatto < > >massimo.sgarava...@gmail.com> wrote: > > > >> Hi > >> > >> I have a ceph cluster, running luminous, composed of 5 OSD nodes, > >which is > >> using filestore. > >> Each OSD node has 2 E5-2620 v4 processors, 64 GB of RAM, 10x6TB SATA > >disk > >> + 2x200GB SSD disk (then I have 2 other disks in RAID for the OS), 10 > >Gbps. > >> So each SSD disk is used for the journal for 5 OSDs. With this > >> configuration everything is running smoothly ... > >> > >> > >> We are now buying some new storage nodes, and I am trying to buy > >something > >> which is bluestore compliant. So the idea is to consider a > >configuration > >> something like: > >> > >> - 10 SATA disks (8TB / 10TB / 12TB each. TBD) > >> - 2 processor (~ 10 core each) > >> - 64 GB of RAM > >> - 2 SSD to be used for WAL+DB > >> - 10 Gbps > >> > >> For what concerns the size of the SSD disks I read in this mailing > >list > >> that it is suggested to have at least 10GB of SSD disk/10TB of SATA > >disk. > >> > >> > >> So, the questions: > >> > >> 1) Does this hardware configuration seem reasonable ? > >> > >> 2) Are there problems to live (forever, or until filestore > >deprecation) > >> with some OSDs using filestore (the old ones) and some OSDs using > >bluestore > >> (the old ones) ? > >> > >> 3) Would you suggest to update to bluestore also the old OSDs, even > >if the > >> available SSDs are too small (they don't satisfy the "10GB of SSD > >disk/10TB > >> of SATA disk" rule) ? > > AFAIR should the db size 4% of the osd in question. > > So > > For example, if the block size is 1TB, then block.db shouldn’t be less > than 40GB > > See: > http://docs.ceph.com/docs/master/rados/configuration/bluestore-config-ref/ > > Hth > - Mehmet > > >> > >> Thanks, Massimo > >> _______________________________________________ > >> ceph-users mailing list > >> ceph-users@lists.ceph.com > >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >> > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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