Hi Haomai, I tried to compare the READ performance of FileStore and KeyValueStore using the internal tool "ceph_smalliobench" and I see KeyValueStore's performance is approx half that of FileStore. I'm using similar conf file as yours. Is this the expected behavior or am I missing something?
Thanks, Sushma On Fri, Feb 28, 2014 at 11:00 PM, Haomai Wang <haomaiw...@gmail.com> wrote: > On Sat, Mar 1, 2014 at 8:04 AM, Danny Al-Gaaf <danny.al-g...@bisect.de> > wrote: > > Hi, > > > > Am 28.02.2014 03:45, schrieb Haomai Wang: > > [...] > >> I use fio which rbd supported from > >> TelekomCloud(https://github.com/TelekomCloud/fio/commits/rbd-engine) > >> to test rbd. > > > > I would recommend to no longer use this branch, it's outdated. The rbd > > engine got contributed back to upstream fio and is now merged [1]. For > > more information read [2]. > > > > [1] https://github.com/axboe/fio/commits/master > > [2] > > > http://telekomcloud.github.io/ceph/2014/02/26/ceph-performance-analysis_fio_rbd.html > > > >> > >> The fio command: fio -direct=1 -iodepth=64 -thread -rw=randwrite > >> -ioengine=rbd -bs=4k -size=19G -numjobs=1 -runtime=100 > >> -group_reporting -name=ebs_test -pool=openstack -rbdname=image > >> -clientname=fio -invalidate=0 > > > > Don't use runtime and size at the same time, since runtime limits the > > size. What we normally do we let the fio job fill up the whole rbd or we > > limit it only via runtime. > > > >> ============================================ > >> > >> FileStore result: > >> ebs_test: (g=0): rw=randwrite, bs=4K-4K/4K-4K/4K-4K, ioengine=rbd, > iodepth=64 > >> fio-2.1.4 > >> Starting 1 thread > >> rbd engine: RBD version: 0.1.8 > >> > >> ebs_test: (groupid=0, jobs=1): err= 0: pid=30886: Thu Feb 27 08:09:18 > 2014 > >> write: io=283040KB, bw=6403.4KB/s, iops=1600, runt= 44202msec > >> slat (usec): min=116, max=2817, avg=195.78, stdev=56.45 > >> clat (msec): min=8, max=661, avg=39.57, stdev=29.26 > >> lat (msec): min=9, max=661, avg=39.77, stdev=29.25 > >> clat percentiles (msec): > >> | 1.00th=[ 15], 5.00th=[ 20], 10.00th=[ 23], 20.00th=[ > 28], > >> | 30.00th=[ 31], 40.00th=[ 35], 50.00th=[ 37], 60.00th=[ > 40], > >> | 70.00th=[ 43], 80.00th=[ 46], 90.00th=[ 51], 95.00th=[ > 58], > >> | 99.00th=[ 128], 99.50th=[ 210], 99.90th=[ 457], 99.95th=[ > 494], > >> | 99.99th=[ 545] > >> bw (KB /s): min= 2120, max=12656, per=100.00%, avg=6464.27, > stdev=1726.55 > >> lat (msec) : 10=0.01%, 20=5.91%, 50=83.35%, 100=8.88%, 250=1.47% > >> lat (msec) : 500=0.34%, 750=0.05% > >> cpu : usr=29.83%, sys=1.36%, ctx=84002, majf=0, minf=216 > >> IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=17.4%, > >=64=82.6% > >> submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, > >=64=0.0% > >> complete : 0=0.0%, 4=99.1%, 8=0.5%, 16=0.3%, 32=0.1%, 64=0.1%, > >=64=0.0% > >> issued : total=r=0/w=70760/d=0, short=r=0/w=0/d=0 > >> latency : target=0, window=0, percentile=100.00%, depth=64 > >> > >> Run status group 0 (all jobs): > >> WRITE: io=283040KB, aggrb=6403KB/s, minb=6403KB/s, maxb=6403KB/s, > >> mint=44202msec, maxt=44202msec > >> > >> Disk stats (read/write): > >> sdb: ios=5/9512, merge=0/69, ticks=4/10649, in_queue=10645, util=0.92% > >> > >> =============================================== > >> > >> KeyValueStore: > >> ebs_test: (g=0): rw=randwrite, bs=4K-4K/4K-4K/4K-4K, ioengine=rbd, > iodepth=64 > >> fio-2.1.4 > >> Starting 1 thread > >> rbd engine: RBD version: 0.1.8 > >> > >> ebs_test: (groupid=0, jobs=1): err= 0: pid=29137: Thu Feb 27 08:06:30 > 2014 > >> write: io=444376KB, bw=6280.2KB/s, iops=1570, runt= 70759msec > >> slat (usec): min=122, max=3237, avg=184.51, stdev=37.76 > >> clat (msec): min=10, max=168, avg=40.57, stdev= 5.70 > >> lat (msec): min=11, max=168, avg=40.75, stdev= 5.71 > >> clat percentiles (msec): > >> | 1.00th=[ 34], 5.00th=[ 37], 10.00th=[ 39], 20.00th=[ > 39], > >> | 30.00th=[ 40], 40.00th=[ 40], 50.00th=[ 41], 60.00th=[ > 41], > >> | 70.00th=[ 42], 80.00th=[ 42], 90.00th=[ 44], 95.00th=[ > 45], > >> | 99.00th=[ 48], 99.50th=[ 50], 99.90th=[ 163], 99.95th=[ > 167], > >> | 99.99th=[ 167] > >> bw (KB /s): min= 4590, max= 7480, per=100.00%, avg=6285.69, > stdev=374.22 > >> lat (msec) : 20=0.02%, 50=99.58%, 100=0.23%, 250=0.17% > >> cpu : usr=29.11%, sys=1.10%, ctx=118564, majf=0, minf=194 > >> IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=0.7%, > >=64=99.3% > >> submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, > >=64=0.0% > >> complete : 0=0.0%, 4=100.0%, 8=0.1%, 16=0.1%, 32=0.0%, 64=0.1%, > >=64=0.0% > >> issued : total=r=0/w=111094/d=0, short=r=0/w=0/d=0 > >> latency : target=0, window=0, percentile=100.00%, depth=64 > >> > >> Run status group 0 (all jobs): > >> WRITE: io=444376KB, aggrb=6280KB/s, minb=6280KB/s, maxb=6280KB/s, > >> mint=70759msec, maxt=70759msec > >> > >> Disk stats (read/write): > >> sdb: ios=0/15936, merge=0/272, ticks=0/17157, in_queue=17146, > util=0.94% > >> > >> > >> It's just a simple test, maybe exist some misleadings on the config or > >> results. But > >> we can obviously see the conspicuous improvement for KeyValueStore. > > > > The numbers are hard to compare. Since the tests wrote a different > > amount of data. This could influence the numbers. > > > > Do you mean improvements compared to former implementation or to > FileStore? > > > > Without a retest with the latest fio rbd engine: there is not so much > > difference between KVS and FS atm. > > > > Btw. Nice to see the rbd engine is useful to others ;-) > > Thanks for your advise and jobs on fio-rbd. :) > > The test isn't preciseness and just a simple test to show the progress > of kvstore. > > > > > Regards > > > > Danny > > > > -- > Best Regards, > > Wheat > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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