Mark, All are running with concurrency 32. Thanks & Regards Somnath
-----Original Message----- From: Mark Nelson [mailto:[email protected]] Sent: Wednesday, September 17, 2014 1:59 PM To: Somnath Roy; [email protected] Subject: Re: severe librbd performance degradation in Giant On 09/17/2014 03:55 PM, Somnath Roy wrote: > Hi Sage, > We are experiencing severe librbd performance degradation in Giant over > firefly release. Here is the experiment we did to isolate it as a librbd > problem. > > 1. Single OSD is running latest Giant and client is running fio rbd on top of > firefly based librbd/librados. For one client it is giving ~11-12K iops (4K > RR). > 2. Single OSD is running Giant and client is running fio rbd on top of Giant > based librbd/librados. For one client it is giving ~1.9K iops (4K RR). > 3. Single OSD is running latest Giant and client is running Giant based > ceph_smaiobench on top of giant librados. For one client it is giving ~11-12K > iops (4K RR). > 4. Giant RGW on top of Giant OSD is also scaling. > > > So, it is obvious from the above that recent librbd has issues. I will raise > a tracker to track this. Hi Somnath, How much concurrency? > > 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 [email protected] More majordomo > info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
