That's what they say, however I did exactly this and my cluster utilization is higher than the total pool utilization by about the number of OSDs * wal size. I want to verify that the wal is on the SSDs too but I've asked here and no one seems to know a way to verify this. Do you?
Thank you, R On Mon, Oct 22, 2018 at 5:22 AM Maged Mokhtar <mmokh...@petasan.org> wrote: > > If you specify a db on ssd and data on hdd and not explicitly specify a > device for wal, wal will be placed on same ssd partition with db. > Placing only wal on ssd or creating separate devices for wal and db are > less common setups. > > /Maged > > On 22/10/18 09:03, Fyodor Ustinov wrote: > > Hi! > > > > For sharing SSD between WAL and DB what should be placed on SSD? WAL or > DB? > > > > ----- Original Message ----- > > From: "Maged Mokhtar" <mmokh...@petasan.org> > > To: "ceph-users" <ceph-users@lists.ceph.com> > > Sent: Saturday, 20 October, 2018 20:05:44 > > Subject: Re: [ceph-users] Drive for Wal and Db > > > > On 20/10/18 18:57, Robert Stanford wrote: > > > > > > > > > > Our OSDs are BlueStore and are on regular hard drives. Each OSD has a > partition on an SSD for its DB. Wal is on the regular hard drives. Should I > move the wal to share the SSD with the DB? > > > > Regards > > R > > > > > > _______________________________________________ > > ceph-users mailing list [ mailto:ceph-users@lists.ceph.com | > ceph-users@lists.ceph.com ] [ > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com | > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com ] > > > > you should put wal on the faster device, wal and db could share the same > ssd partition, > > > > Maged > > > > _______________________________________________ > > 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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