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!
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