Sébastien Han actually covers this on his blog: http://www.sebastien-han.fr/blog/2012/08/17/ceph-storage-node-maintenance/
His use case is moving from an embedded journal to one on an SSD but the steps can be used to move/recreate the journal for any reason: Mark the OSD "out" Stop the OSD daemon Run "ceph-osd -i N --flush-journal", replacing N with the ID of the OSD Get your new journal location ready if it isn't Update ceph.conf with the new journal settings Run "ceph-osd -i N --mkjournal", again replacing N with the ID of the OSD Start the OSD daemon Mark the OSD "in" I used the procedure above to migrate 16 OSD's on 4 hosts from file-based journals to partition-based with no downtime or data loss. (Just be aware of your crush rules and only have one OSD, host, etc. down at a time.) JN On Mar 27, 2013, at 7:03 AM, Aleksey Samarin <nrg3...@gmail.com> wrote: > Well, after few tests, i can't increase size of journal. I think size of > journal set only when osd create. So for change journal size u need to delete > osd and create with new journal. > > > 2013/3/26 Chen, Xiaoxi <xiaoxi.c...@intel.com> > Are you using a partition as journal? > > > > From: ceph-users-boun...@lists.ceph.com > [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of Aleksey Samarin > Sent: 2013年3月26日 20:45 > To: ceph-us...@ceph.com > Subject: [ceph-users] Journal size > > > > Hello everyone! > > I have question about journal. Ceph cluster is already working with 1gb > journal per osd. I wanna to increase size of journal, is this possible? > If yes, how i can do this? > > All the best, Alex! > > > _______________________________________________ > 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
