Re: Deleted a pool - when will a PG be removed from the OSD?

[Daniel Marks <daniel.marks@xxxxxxxxxxxxxx>]

No they are not empty, but I compared the size with my records form yesterday. You are right they are getting smaller, it is just incredibly slow. The pool was an OpenStack Gnocchi pool that created several million small files on each OSD. (Happy to get rid of gnocchi now…) The OSD is slowly deleting those files - visible on the slowly decreasing number of used inodes on the device. 

On 20. Apr 2017, at 14:16, David Turner <drakonstein@xxxxxxxxx> wrote:

Is there any data in those directories? Do a du on them and see if they are getting smaller over time, or maybe they're already empty and failed too delete the main folder.

On Thu, Apr 20, 2017, 2:46 AM Daniel Marks <daniel.marks@xxxxxxxxxxxxxx> wrote:

Hi all,

I am wondering when the PGs for a deleted pool get removed from their OSDs. http://docs.ceph.com/docs/master/dev/osd_internals/pg_removal/ says that it is happening asynchronously, but what is the trigger?

I deleted the pool with id 15 two days ago, but I am still seeing the PG directories on the OSD:

/var/lib/ceph/osd/ceph-118/current # ls -1 | grep "^15"

15.8f_head

15.8f_TEMP

15.99_head

15.99_TEMP

15.f4_head

15.f4_TEMP

Best regards,

Daniel Marks

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