I don't think the backing store should be seeing any effects like that. What are the filenames which are using up that space inside the folders? -Greg Software Engineer #42 @ http://inktank.com | http://ceph.com
On Wed, Apr 9, 2014 at 1:58 AM, Mark Kirkwood <mark.kirkw...@catalyst.net.nz> wrote: > Hi all, > > I've noticed that objects are using twice their actual space for a few > minutes after they are 'put' via rados: > > $ ceph -v > ceph version 0.79-42-g010dff1 (010dff12c38882238591bb042f8e497a1f7ba020) > > $ ceph osd tree > # id weight type name up/down reweight > -1 0.03998 root default > -2 0.009995 host ceph1 > 0 0.009995 osd.0 up 1 > -3 0.009995 host ceph2 > 1 0.009995 osd.1 up 1 > -4 0.009995 host ceph3 > 2 0.009995 osd.2 up 1 > -5 0.009995 host ceph4 > 3 0.009995 osd.3 up 1 > > $ ceph osd dump|grep repool > pool 5 'repool' replicated size 3 min_size 2 crush_ruleset 0 object_hash > rjenkins pg_num 64 pgp_num 64 last_change 57 owner 0 flags hashpspool > stripe_width 0 > > $ du -m file > 1025 file > > $ rados put -p repool file file > > $ cd /var/lib/ceph/osd/ceph-1/current/ > $ du -m 5.1a_head > 2048 5.1a_head > > [later] > > $ du -m 5.1a_head > 1024 5.1a_head > > The above situation is repeated on the other two OSD's where this pg is > mapped. So after about 5 minutes or so we have (as expected) that the 1G > file is using 1G on each of the 3 OSD's it is mapped to, however for a short > period of time it is using twice this! I very interested to know what > activity is happening that causes the 2x space use - as this could be a > significant foot gun if uploading large files when we don't have 2x the > space available on each OSD. > > Regards > > Mark > _______________________________________________ > 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
