Thanks Sam. So, you want me to go with optracker/shadedopWq , right ? Regards Somnath
-----Original Message----- From: Samuel Just [mailto:sam.j...@inktank.com] Sent: Wednesday, September 10, 2014 2:36 PM To: Somnath Roy Cc: Sage Weil (sw...@redhat.com); ceph-de...@vger.kernel.org; ceph-users@lists.ceph.com Subject: Re: OpTracker optimization Responded with cosmetic nonsense. Once you've got that and the other comments addressed, I can put it in wip-sam-testing. -Sam On Wed, Sep 10, 2014 at 1:30 PM, Somnath Roy <somnath....@sandisk.com> wrote: > Thanks Sam..I responded back :-) > > -----Original Message----- > From: ceph-devel-ow...@vger.kernel.org > [mailto:ceph-devel-ow...@vger.kernel.org] On Behalf Of Samuel Just > Sent: Wednesday, September 10, 2014 11:17 AM > To: Somnath Roy > Cc: Sage Weil (sw...@redhat.com); ceph-de...@vger.kernel.org; > ceph-users@lists.ceph.com > Subject: Re: OpTracker optimization > > Added a comment about the approach. > -Sam > > On Tue, Sep 9, 2014 at 1:33 PM, Somnath Roy <somnath....@sandisk.com> wrote: >> Hi Sam/Sage, >> >> As we discussed earlier, enabling the present OpTracker code >> degrading performance severely. For example, in my setup a single OSD >> node with >> 10 clients is reaching ~103K read iops with io served from memory >> while optracking is disabled but enabling optracker it is reduced to ~39K >> iops. >> Probably, running OSD without enabling OpTracker is not an option for >> many of Ceph users. >> >> Now, by sharding the Optracker:: ops_in_flight_lock (thus xlist >> ops_in_flight) and removing some other bottlenecks I am able to match >> the performance of OpTracking enabled OSD with OpTracking disabled, >> but with the expense of ~1 extra cpu core. >> >> In this process I have also fixed the following tracker. >> >> >> >> http://tracker.ceph.com/issues/9384 >> >> >> >> and probably http://tracker.ceph.com/issues/8885 too. >> >> >> >> I have created following pull request for the same. Please review it. >> >> >> >> https://github.com/ceph/ceph/pull/2440 >> >> >> >> Thanks & Regards >> >> Somnath >> >> >> >> >> ________________________________ >> >> 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). >> > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" > in the body of a message to majord...@vger.kernel.org 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). > _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
