On Tue, Apr 5, 2016 at 12:55 AM, Gregory Farnum <gfarnum@xxxxxxxxxx> wrote: > 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 ? Check /sys/kernel/debug/ceph/xxx/mdsc, you can roughly get how fast unlink requests are handled. If MDS's CPU usage is less than 100%. you can try running multiple instance of 'rm -rf' (each one removes different sub-directory) Regards Yan, Zheng >> >> Thank you very much! >> >> Kenneth >> >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
 |