Re: Nearly full OSDs with very little (apparent) FS utilization

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Hi,

Sorry for the very late reply. I have been trying a lot of things...

On 25/10/13 22:40, Yan, Zheng wrote:
On Sat, Oct 26, 2013 at 2:05 AM, Gregory Farnum <greg@xxxxxxxxxxx> wrote:
Are you sure you're using only CephFS? Do you have any snapshots?
-Greg
Software Engineer #42 @ http://inktank.com | http://ceph.com


On Fri, Oct 25, 2013 at 2:59 AM, Miguel Afonso Oliveira
<m.a.oliveira@xxxxxxxxxxx> wrote:
Hi,

I have a recent ceph deployment with version:

ceph version 0.67.4 (ad85b8bfafea6232d64cb7ba76a8b6e8252fa0c7)

on 4 12TB OSDs:

GLOBAL:
     SIZE       AVAIL     RAW USED     %RAW USED
     49143G     8285G     40858G       83.14

POOLS:
     NAME         ID     USED       %USED     OBJECTS
     data         0      20396G     41.50     7342052
     metadata     1      276M       0         81826
     rbd          2      0          0         0

and this morning I started to get a warning about a full OSD:

   cluster 14320bfb-8b8c-4280-afee-df63172b1d0c
    health HEALTH_WARN 1 near full osd(s)
    monmap e3: 3 mons at
{gridio1=10.112.0.148:6789/0,gridio2=10.112.0.149:6789/0,gridio3=10.112.0.150:6789/0},
election epoch 44, quorum 0,1,2 gridio1,gridio2,gridio3
    osdmap e498: 4 osds: 4 up, 4 in
     pgmap v485463: 6144 pgs: 6142 active+clean, 2
active+clean+scrubbing+deep; 20396 GB data, 40858 GB used, 8285 GB / 49143
GB avail; 2252B/s wr, 0op/s
    mdsmap e54: 1/1/1 up {0=gridio4=up:active}

However when I use a du on the mount point I get:

[root@ce01 /]# du -bsh grid/
31G    grid/
[root@ce01 /]# du -bsh grid/
31G    grid/
what is the output of 'getfattr -d -m - grid/' ?

[root@ce01 ~]# getfattr -d -m -  /grid
getfattr: Removing leading '/' from absolute path names
# file: grid
ceph.dir.layout="stripe_unit=4194304 stripe_count=1 object_size=4194304 pool=data"


sounds like the 'purge strays' bug. try umounting all clients and
restarting the mds.

I think you have nailed it on the head! I have now updated to:

ceph version 0.72.1 (4d923861868f6a15dcb33fef7f50f674997322de)

but I still see the same behavior. Is there anything else I can do other than keep having to do this every time until the bug is solved? Any idea when will
that be? Next release?

Cheers,

MAO



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