On 22/10/2013 19:26, Gregory Farnum wrote: > 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.
Thanks. It makes things real simple from the configuration point of view :-) Cheers > -Greg > Software Engineer #42 @ http://inktank.com | http://ceph.com > -- Loïc Dachary, Artisan Logiciel Libre All that is necessary for the triumph of evil is that good people do nothing.
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