I bumped up the backfill/recovery settings to match up Hammer. It is probably unlikely that long tail latency is a parallelism issue. If so, entire recovery would be suffering not the tail alone. It's probably a prioritization issue. Will start looking and update my findings. I can't add devl because of the table but needed to add community that's why ceph-users :-).. Also, wanted to know from Ceph's user if they are also facing similar issues.. Thanks & Regards Somnath -----Original Message----- From: Christian Balzer [mailto:chibi@xxxxxxx] Sent: Wednesday, May 11, 2016 12:31 AM To: Somnath Roy Cc: Mark Nelson; Nick Fisk; ceph-users@xxxxxxxxxxxxxx Subject: Re: Weighted Priority Queue testing Hello, not sure if the Cc: to the users ML was intentional or not, but either way. The issue seen in the tracker: http://tracker.ceph.com/issues/15763 and what you have seen (and I as well) feels a lot like the lack of parallelism towards the end of rebuilds. This becomes even more obvious when backfills and recovery settings are lowered. Regards, Christian -- Christian Balzer Network/Systems Engineer chibi@xxxxxxx Global OnLine Japan/Rakuten Communications http://www.gol.com/ PLEASE NOTE: The information contained in this electronic mail message is intended only for the use of the designated recipient(s) named above. If the reader of this message is not the intended recipient, you are hereby notified that you have received this message in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify the sender by telephone or e-mail (as shown above) immediately and destroy any and all copies of this message in your possession (whether hard copies or electronically stored copies). _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
 |