I also checked that all files in that PG still are on that PG :
for IMG in `find . -type f -printf '%f\n' | awk -F '__' '{ print $1 }' |
sort --unique` ; do echo -n "$IMG "; ceph osd map ssd3copies $IMG | grep
-v 6\\.31f ; echo ; done
And all objects are referenced in rados (compared with "rados --pool
ssd3copies ls rados.ssd3copies.dump").
Le mardi 10 septembre 2013 à 13:46 +0200, Olivier Bonvalet a écrit :
> Some additionnal informations : if I look on one PG only, for example
> the 6.31f. "ceph pg dump" report a size of 616GB :
>
> # ceph pg dump | grep ^6\\. | awk '{ SUM+=($6/1024/1024) } END { print SUM }'
> 631717
>
> But on disk, on the 3 replica I have :
> # du -sh /var/lib/ceph/osd/ceph-50/current/6.31f_head/
> 1,3G /var/lib/ceph/osd/ceph-50/current/6.31f_head/
>
> Since I was suspected a snapshot problem, I try to count only "head
> files" :
> # find /var/lib/ceph/osd/ceph-50/current/6.31f_head/ -type f -name '*head*'
> -print0 | xargs -r -0 du -hc | tail -n1
> 448M total
>
> and the content of the directory : http://pastebin.com/u73mTvjs
>
>
> Le mardi 10 septembre 2013 à 10:31 +0200, Olivier Bonvalet a écrit :
> > Hi,
> >
> > I have a space problem on a production cluster, like if there is unused
> > data not freed : "ceph df" and "rados df" reports 613GB of data, and
> > disk usage is 2640GB (with 3 replica). It should be near 1839GB.
> >
> >
> > I have 5 hosts, 3 with SAS storage and 2 with SSD storage. I use crush
> > rules to put pools on SAS or on SSD.
> >
> > My pools :
> > # ceph osd dump | grep ^pool
> > pool 0 'data' rep size 3 min_size 1 crush_ruleset 0 object_hash rjenkins
> > pg_num 576 pgp_num 576 last_change 68315 owner 0 crash_replay_interval 45
> > pool 1 'metadata' rep size 3 min_size 1 crush_ruleset 1 object_hash
> > rjenkins pg_num 576 pgp_num 576 last_change 68317 owner 0
> > pool 2 'rbd' rep size 3 min_size 1 crush_ruleset 2 object_hash rjenkins
> > pg_num 576 pgp_num 576 last_change 68321 owner 0
> > pool 3 'hdd3copies' rep size 3 min_size 1 crush_ruleset 4 object_hash
> > rjenkins pg_num 200 pgp_num 200 last_change 172933 owner 0
> > pool 6 'ssd3copies' rep size 3 min_size 1 crush_ruleset 7 object_hash
> > rjenkins pg_num 800 pgp_num 800 last_change 172929 owner 0
> > pool 9 'sas3copies' rep size 3 min_size 1 crush_ruleset 4 object_hash
> > rjenkins pg_num 2048 pgp_num 2048 last_change 172935 owner 0
> >
> > Only hdd3copies, sas3copies and ssd3copies are really used :
> > # ceph df
> > GLOBAL:
> > SIZE AVAIL RAW USED %RAW USED
> > 76498G 51849G 24648G 32.22
> >
> > POOLS:
> > NAME ID USED %USED OBJECTS
> > data 0 46753 0 72
> > metadata 1 0 0 0
> > rbd 2 8 0 1
> > hdd3copies 3 2724G 3.56 5190954
> > ssd3copies 6 613G 0.80 347668
> > sas3copies 9 3692G 4.83 764394
> >
> >
> > My CRUSH rules was :
> >
> > rule SASperHost {
> > ruleset 4
> > type replicated
> > min_size 1
> > max_size 10
> > step take SASroot
> > step chooseleaf firstn 0 type host
> > step emit
> > }
> >
> > and :
> >
> > rule SSDperOSD {
> > ruleset 3
> > type replicated
> > min_size 1
> > max_size 10
> > step take SSDroot
> > step choose firstn 0 type osd
> > step emit
> > }
> >
> >
> > but, since the cluster was full because of that space problem, I swith to a
> > different rule :
> >
> > rule SSDperOSDfirst {
> > ruleset 7
> > type replicated
> > min_size 1
> > max_size 10
> > step take SSDroot
> > step choose firstn 1 type osd
> > step emit
> > step take SASroot
> > step chooseleaf firstn -1 type net
> > step emit
> > }
> >
> >
> > So with that last rule, I should have only one replica on my SSD OSD, so
> > 613GB of space used. But if I check on OSD I see 1212GB really used.
> >
> > I also use snapshots, maybe snapshots are ignored by "ceph df" and "rados
> > df" ?
> >
> > Thanks for any help.
> >
> > Olivier
> >
> > _______________________________________________
> > ceph-users mailing list
> > ceph-users@lists.ceph.com
> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> >
>
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