Hi, Thaks for Your response. > - with ~6,5k objects, size ~1,4G > - with ~13k objects, size ~2,8G is on one the biggest pool 5 '.rgw.buckets' > This is because pg_num is not a power of 2 This is for all PGs (sum of all pools) or for pool 5 '.rgw.buckets' where i have almost all data ? > Did you try, ceph osd crush tunables optimal No, I'll try it after change pg_num to correct value. -- Regards Dominik 2014-01-30 Sage Weil <sage@xxxxxxxxxxx>: > On Thu, 30 Jan 2014, Dominik Mostowiec wrote: >> Hi, >> I found something else. >> 'ceph pg dump' shows PGs: >> - with zero or near zero objects count > > These are probably for a different pool than the big ones, right? The > PG id is basically $pool.$shard. > >> - with ~6,5k objects, size ~1,4G >> - with ~13k objects, size ~2,8G >> This can be a reason of wrong data distribution on OSD's? > > This is because pg_num is not a power of 2. Generally that won't result > in an imbalance as drastic as yours, though. If you do adjust pg_num, > bump it up to the power of 2. > > Did you try > > ceph osd crush tunables optimal > > ? > sage > > >> >> --- >> Regards >> Dominik >> >> >> 2014-01-30 Dominik Mostowiec <dominikmostowiec@xxxxxxxxx>: >> > Hi, >> > I have problem with data distribution. >> > Smallest disk usage 40% vs highest 82%. >> > All PGS: 6504. >> > Almost all data is in '.rgw.buckets' pool with pg_num 4800. >> > The best way to better data distribution is increese pg_num in this pool? >> > Is thre another way? ( eg crush tunables, or something like that ..) >> > >> > Config: 9 hosts X 22 OSD = 198 OSDs >> > replica = 3 >> > >> > ceph -v >> > ceph version 0.67.5 (a60ac9194718083a4b6a225fc17cad6096c69bd1) >> > >> > ceph osd dump: >> > pool 0 'data' rep size 3 min_size 1 crush_ruleset 0 object_hash >> > rjenkins pg_num 64 pgp_num 64 last_change 28459 owner 0 >> > crash_replay_interval 45 >> > pool 1 'metadata' rep size 3 min_size 1 crush_ruleset 1 object_hash >> > rjenkins pg_num 64 pgp_num 64 last_change 28460 owner 0 >> > pool 2 'rbd' rep size 3 min_size 1 crush_ruleset 2 object_hash >> > rjenkins pg_num 64 pgp_num 64 last_change 28461 owner 0 >> > pool 3 '.rgw.buckets' rep size 3 min_size 1 crush_ruleset 0 >> > object_hash rjenkins pg_num 4800 pgp_num 4800 last_change 28462 owner >> > 0 >> > pool 4 '.log' rep size 3 min_size 1 crush_ruleset 0 object_hash >> > rjenkins pg_num 1440 pgp_num 1440 last_change 28463 owner 0 >> > pool 5 '.rgw' rep size 3 min_size 1 crush_ruleset 0 object_hash >> > rjenkins pg_num 8 pgp_num 8 last_change 28464 owner 0 >> > pool 6 '.users.uid' rep size 3 min_size 1 crush_ruleset 0 object_hash >> > rjenkins pg_num 8 pgp_num 8 last_change 28465 owner 0 >> > pool 7 '.users' rep size 3 min_size 1 crush_ruleset 0 object_hash >> > rjenkins pg_num 8 pgp_num 8 last_change 28466 owner 0 >> > pool 8 '.usage' rep size 2 min_size 1 crush_ruleset 0 object_hash >> > rjenkins pg_num 8 pgp_num 8 last_change 28467 owner >> > 18446744073709551615 >> > pool 9 '.intent-log' rep size 3 min_size 1 crush_ruleset 0 object_hash >> > rjenkins pg_num 8 pgp_num 8 last_change 28468 owner >> > 18446744073709551615 >> > pool 10 '.rgw.control' rep size 3 min_size 1 crush_ruleset 0 >> > object_hash rjenkins pg_num 8 pgp_num 8 last_change 33485 owner >> > 18446744073709551615 >> > pool 11 '.rgw.gc' rep size 3 min_size 1 crush_ruleset 0 object_hash >> > rjenkins pg_num 8 pgp_num 8 last_change 33487 owner >> > 18446744073709551615 >> > pool 12 '.rgw.root' rep size 2 min_size 1 crush_ruleset 0 object_hash >> > rjenkins pg_num 8 pgp_num 8 last_change 44540 owner 0 >> > pool 13 '' rep size 2 min_size 1 crush_ruleset 0 object_hash rjenkins >> > pg_num 8 pgp_num 8 last_change 46912 owner 0 >> > >> > rados df: >> > pool name category KB objects clones >> > degraded unfound rd rd KB wr >> > wr KB >> > - 0 0 0 >> > 0 0 0 0 0 >> > 0 >> > .intent-log - 0 0 0 >> > 0 0 1 0 1893949 >> > 1893697 >> > .log - 69222 6587 0 >> > 0 0 0 0 172911881 >> > 172884792 >> > .rgw - 114449 813564 0 >> > 0 0 51094886 39834914 3606364 >> > 1047115 >> > .rgw.buckets - 10371229682 54367877 0 >> > 0 0 2610759046 54967451976 1930820947 >> > 24031291524 >> > .... >> > empty pools >> > >> > -- >> > Regards >> > Dominik >> >> >> >> -- >> Pozdrawiam >> Dominik >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> >> -- Pozdrawiam Dominik _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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