Re: cephfs rm -rf on directory of 160TB /40M files

[Gregory Farnum <gfarnum@xxxxxxxxxx>]

Deletes are just slow right now. You can look at the ops in flight on you client or MDS admin socket to see how far along it is and watch them to see how long stuff is taking -- I think it's a sync disk commit for each unlink though so at 40M it's going to be a good looong while. :/

-Greg

On Monday, April 4, 2016, Kenneth Waegeman <kenneth.waegeman@xxxxxxxx> wrote:

Hi all,

I want to remove a large directory containing +- 40M files /160TB of data in CephFS by running rm -rf on the directory via the ceph kernel client.
After 7h , the rm command is still running. I checked the rados df output, and saw that only about  2TB and 2M files are gone.
I know this output of rados df can be confusing because ceph should delete objects asyncroniously, but then I don't know why the rm command still hangs.
Is there some way to speed this up? And is there a way to check how far the marked for deletion has progressed ?

Thank you very much!

Kenneth

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