oh my.. yes 2TB enterprise class SSDs, that a much higher requirement than filestore needed. That would be cost prohibitive to any lower end ceph cluster,
On Thu, Oct 4, 2018 at 11:19 PM Massimo Sgaravatto < massimo.sgarava...@gmail.com> wrote: > 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 >> > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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