> It's the monitor who is preparing the new pool before creating it. I had a > discussion regarding this with Greg some time ago, can't re-call if this was > on IRC or the ml though. Well actually I think I was in the conversation and it was on IRC, but I had completely forget about it. -_- Thanks the clarification. It may sound weird but if the monitors handles the pool creation, it makes sense. Now I'm surprised to see that the admin socket has a different value. Moreover after changing the configuration and set the default size to 2 and restarted every OSD. It looks like the cluster continue to create a pool size of 3... Could be a bug then, any idea? On Fri, Oct 26, 2012 at 3:41 PM, Wido den Hollander <wido@xxxxxxxxx> wrote: > On 10/26/2012 10:17 AM, Sébastien Han wrote: >> >> Hi Cephers! >> >> Some question about this parameter: >> >> - Why does this parameter need to be in the [mon] section to work? > > > It's the monitor who is preparing the new pool before creating it. I had a > discussion regarding this with Greg some time ago, can't re-call if this was > on IRC or the ml though. > > It however contradicts what's in the docs: > http://ceph.com/docs/master/config-cluster/osd-config-ref/ > > The docs seem to be wrong at this point: > > * src/mon/OSDMonitor.cc * > > int OSDMonitor::prepare_new_pool(string& name, uint64_t auid, int > crush_rule, > unsigned pg_num, unsigned pgp_num) > { > .. > .. > pending_inc.new_pools[pool].size = g_conf->osd_pool_default_size; > .. > .. > } > > This is done by the monitor. > > There seems to be some reference for this in src/osd/OSDMap.cc, but that > seems to be for initializing the cluster since it creates the data, metadata > and rbd pool there. > > This was fixed in this commit: > https://github.com/ceph/ceph/commit/1292436b8f88ce203bdba97278ce368b1dfa025f > > Seems to be because of this message on the ml last year: > http://comments.gmane.org/gmane.comp.file-systems.ceph.devel/2983 > > So yes, it is odd that something prefixed with "osd" should go into the mon > section. > > Wido > >> - In my ceph.conf I set a default size of 3: >> >> # rados mkpool lol >> successfully created pool lol >> >> # ceph osd dump | grep lol >> pool 31 'lol' rep size 3 crush_ruleset 0 object_hash rjenkins pg_num 8 >> pgp_num 8 last_change 430 owner 18446744073709551615 >> >> Now if I retrieve the admin daemon I get, >> >> # ceph --admin-daemon /var/run/ceph/ceph-osd.0.asok config show | grep >> 'osd_pool_default_size' >> osd_pool_default_size = 2 >> >> Why? Did I something wrong? >> >> Thanks :) >> >> Cheers! >> -- >> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
