On Mon, Oct 21, 2013 at 11:13 PM, Loic Dachary <[email protected]> wrote: > > > On 21/10/2013 18:49, Gregory Farnum wrote: >> I'm not quite sure what questions you're actually asking here... >> In general, the OSD is not removed from the system without explicit >> admin intervention. When it is removed, all traces of it should be >> zapped (including its key), so it can't reconnect. >> If it hasn't been removed, then indeed it will continue working >> properly even if moved to a different box. > > If there is an external journal, the device containing the journal needs to > be moved with the device containing the data. If I read > ceph/src/upstart/ceph-osd.conf correctly, when the data device is plugged in > the new machine it will fail to start because the journal is not there yet. > When the journal device is plugged in, the ceph-osd.conf would be called > because udev rule in ceph/udev/95-ceph-osd.rules call ceph-disk > activate-journal. > > Is my understanding correct ?
Well, after being wrong last time I'm a little reluctant to make pronouncements from memory, but that definitely sounds correct to me. :) If I were doing an audit I'd want to look at what happens if there is a wrong journal in the correct location, etc. -Greg Software Engineer #42 @ http://inktank.com | http://ceph.com -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
