Hello Am 4. Oktober 2018 02:38:35 MESZ schrieb solarflow99 <solarflow99@xxxxxxxxx>: >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.sgaravatto@xxxxxxxxx> 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@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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