Another thread about it(http://comments.gmane.org/gmane.comp.file-systems.ceph.devel/19284)
On Fri, Aug 29, 2014 at 11:01 AM, Haomai Wang <haomaiw...@gmail.com> wrote: > Hi Roy, > > I already scan your merged codes about "fdcache" and "optimizing for > lfn_find/lfn_open", could you give some performance improvement data > about it? I fully agree with your orientation, do you have any update > about it? > > As for messenger level, I have some very early works on > it(https://github.com/yuyuyu101/ceph/tree/msg-event), it contains a > new messenger implementation which support different event mechanism. > It looks like at least one more week to make it work. > > On Fri, Aug 29, 2014 at 5:48 AM, Somnath Roy <somnath....@sandisk.com> wrote: >> Yes, what I saw the messenger level bottleneck is still huge ! >> Hopefully RDMA messenger will resolve that and the performance gain will be >> significant for Read (on SSDs). For write we need to uncover the OSD >> bottlenecks first to take advantage of the improved upstream. >> What I experienced that till you remove the very last bottleneck the >> performance improvement will not be visible and that could be confusing >> because you might think that the upstream improvement you did is not valid >> (which is not). >> >> Thanks & Regards >> Somnath >> -----Original Message----- >> From: Andrey Korolyov [mailto:and...@xdel.ru] >> Sent: Thursday, August 28, 2014 12:57 PM >> To: Somnath Roy >> Cc: David Moreau Simard; Mark Nelson; ceph-users@lists.ceph.com >> Subject: Re: [ceph-users] [Single OSD performance on SSD] Can't go over 3, >> 2K IOPS >> >> On Thu, Aug 28, 2014 at 10:48 PM, Somnath Roy <somnath....@sandisk.com> >> wrote: >>> Nope, this will not be back ported to Firefly I guess. >>> >>> Thanks & Regards >>> Somnath >>> >> >> Thanks for sharing this, the first thing in thought when I looked at this >> thread, was your patches :) >> >> If Giant will incorporate them, both the RDMA support and those should give >> a huge performance boost for RDMA-enabled Ceph backnets. >> >> ________________________________ >> >> 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 > > > > -- > Best Regards, > > Wheat -- Best Regards, Wheat _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
