I did exactly this when creating my osds, and found that my total utilization is about the same as the sum of the utilization of the pools, plus (wal size * number osds). So it looks like my wals are actually sharing OSDs. But I'd like to be 100% sure... so I am seeking a way to find out
On Sun, Oct 21, 2018 at 11:13 AM Serkan Çoban <cobanser...@gmail.com> wrote: > wal and db device will be same if you use just db path during osd > creation. i do not know how to verify this with ceph commands. > On Sun, Oct 21, 2018 at 4:17 PM Robert Stanford <rstanford8...@gmail.com> > wrote: > > > > > > Thanks Serkan. I am using --path instead of --dev (dev won't work > because I'm using VGs/LVs). The output shows block and block.db, but > nothing about wal.db. How can I learn where my wal lives? > > > > > > > > > > On Sun, Oct 21, 2018 at 12:43 AM Serkan Çoban <cobanser...@gmail.com> > wrote: > >> > >> ceph-bluestore-tool can show you the disk labels. > >> ceph-bluestore-tool show-label --dev /dev/sda1 > >> On Sun, Oct 21, 2018 at 1:29 AM Robert Stanford < > rstanford8...@gmail.com> wrote: > >> > > >> > > >> > An email from this list stated that the wal would be created in the > same place as the db, if the db were specified when running ceph-volume lvm > create, and the db were specified on that command line. I followed those > instructions and like the other person writing to this list today, I was > surprised to find that my cluster usage was higher than the total of pools > (higher by an amount the same as all my wal sizes on each node combined). > This leads me to think my wal actually is on the data disk and not the ssd > I specified the db should go to. > >> > > >> > How can I verify which disk the wal is on, from the command line? > I've searched the net and not come up with anything. > >> > > >> > Thanks and regards > >> > R > >> > > >> > _______________________________________________ > >> > ceph-users mailing list > >> > ceph-users@lists.ceph.com > >> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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