On Mon, 21 Oct 2013, Snider, Tim wrote: > Sage - > The journal device needs a file system created does that device need to be mounted? Yes.. the mkjournal step needs to writes to the journal (wehther it's a file or block device). sage > Tim > > -----Original Message----- > From: Sage Weil [mailto:sage@xxxxxxxxxxx] > Sent: Thursday, October 17, 2013 11:02 AM > To: Snider, Tim > Cc: ceph-users@xxxxxxxxxxxxxx > Subject: RE: changing from default journals to external journals > > On Thu, 17 Oct 2013, Snider, Tim wrote: > > /var/lib/ceph/osd/ceph-NNN/journal is a "real" file on my system: > > ls -l /var/lib/ceph/osd/ceph-0/journal > > -rw-r--r-- 1 root root 1073741824 Oct 17 06:47 > > /var/lib/ceph/osd/ceph-0/journal > > > > Any problems with my proposed added steps (3 - 5)? > > > > 1. stop a ceph-osd daemon > > 2. ceph-osd --flush-journal -i NNN > > 3. (+) cp /var/lib/ceph/osd/ceph-NNN/journal /var/lib/ceph/osd/ceph-NNN/journal.saved > > 4. (+) create a new empty journal file: > > touch /mount/sdzNNN/journal > > 5. (+) Create the symbolic link for Ceph: > > ln -s /mount/sdzNNN/journal var/lib/ceph/osd/ceph-NNN/journal > > 3. mv journal journal.old > 4. ln -s /dev/whatever journal > > (you're better off using a raw partition or other block device than a > file.) or, > > 4. touch /new/path > 5. ln -s /other/path journal > > > 6. ceph-osd --mkjournal -i NNN > > 7. start ceph-osd > > > > Tim > > -----Original Message----- > > From: Sage Weil [mailto:sage@xxxxxxxxxxx] > > Sent: Wednesday, October 16, 2013 5:02 PM > > To: Snider, Tim > > Cc: ceph-users@xxxxxxxxxxxxxx > > Subject: Re: changing from default journals to external > > journals > > > > On Wed, 16 Oct 2013, Snider, Tim wrote: > > > I configured my cluster using the default journal location for my > > > osds. Can I migrate the default journals to explicit separate > > > devices without a complete cluster teardown and reinstallation? How? > > > > - stop a ceph-osd daemon, then > > - ceph-osd --flush-journal -i NNN > > - set/adjust the journal symlink at /var/lib/ceph/osd/ceph-NNN/journal to > > point wherever you want > > - ceph-osd --mkjournal -i NNN > > - start ceph-osd > > > > This won't set up the udev magic on the journal device, but that doesn't really matter if you're not hotplugging devices. > > > > sage > > > > > > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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