I think you need to disable exclusive lock now explicitly (since it is default 'on' in Jewel) otherwise you need to live with severe performance degradation is I mentioned. Thanks & Regards Somnath -----Original Message----- From: Alexandre DERUMIER [mailto:aderumier@xxxxxxxxx] Sent: Saturday, May 28, 2016 12:29 AM To: dillaman@xxxxxxxxxx Cc: Somnath Roy; Samuel Just; ceph-devel Subject: Re: Severe performance degradation with jewel rbd image Hi, qemu should have soon multithreaded disk access support (multi queues + multi iothreads) https://lists.gnu.org/archive/html/qemu-devel/2016-05/msg05023.html Do you think it'll work with exclusive-lock ? ----- Mail original ----- De: "Jason Dillaman" <jdillama@xxxxxxxxxx> À: "Somnath Roy" <Somnath.Roy@xxxxxxxxxxx> Cc: "Samuel Just" <sjust@xxxxxxxxxx>, "ceph-devel" <ceph-devel@xxxxxxxxxxxxxxx> Envoyé: Jeudi 26 Mai 2016 20:52:26 Objet: Re: Severe performance degradation with jewel rbd image You can dynamically enable/disable exclusive-lock, object-map, fast-diff, and journaling after the image is created via "rbd feature disable <image-spec> <feature>". The deep-flatten feature can be disabled-only via the same CLI. -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html 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). ��.n��������+%������w��{.n����z��u���ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
