[Sorry for the blank email; I missed!] On Sun, Nov 4, 2012 at 1:04 PM, Aleksey Samarin <nrg3tik@xxxxxxxxx> wrote: > Hi! > This command? ceph tell osd \* bench > Output: tell target 'osd' not a valid entity name I guess it's "ceph osd tell \* bench". Try that one. :) > Well, i did pool by command ceph osd pool create bench2 120 > This output of rados -p bench2 bench 30 write --no-cleanup > > rados -p bench2 bench 30 write --no-cleanup > > Maintaining 16 concurrent writes of 4194304 bytes for at least 30 seconds. > Object prefix: benchmark_data_host01_5827 > sec Cur ops started finished avg MB/s cur MB/s last lat avg lat > 0 0 0 0 0 0 - 0 > 1 16 29 13 51.9885 52 0.489268 0.186749 > 2 16 52 36 71.9866 92 1.87226 0.711888 > 3 16 57 41 54.657 20 0.089697 0.697821 > 4 16 60 44 43.9923 12 1.61868 0.765361 > 5 16 60 44 35.1941 0 - 0.765361 > 6 16 60 44 29.3285 0 - 0.765361 > 7 16 60 44 25.1388 0 - 0.765361 > 8 16 61 45 22.4964 1 5.89643 0.879384 > 9 16 62 46 20.4412 4 6.0234 0.991211 > 10 16 62 46 18.3971 0 - 0.991211 > 11 16 63 47 17.0883 2 8.79749 1.1573 > 12 16 63 47 15.6643 0 - 1.1573 > 13 16 63 47 14.4593 0 - 1.1573 > 14 16 63 47 13.4266 0 - 1.1573 > 15 16 63 47 12.5315 0 - 1.1573 > 16 16 63 47 11.7483 0 - 1.1573 > 17 16 63 47 11.0572 0 - 1.1573 > 18 16 63 47 10.4429 0 - 1.1573 > 19 16 63 47 9.89331 0 - 1.1573 > 2012-11-04 15:58:15.473733min lat: 0.036475 max lat: 8.79749 avg lat: 1.1573 > sec Cur ops started finished avg MB/s cur MB/s last lat avg lat > 20 16 63 47 9.39865 0 - 1.1573 > 21 16 63 47 8.95105 0 - 1.1573 > 22 16 63 47 8.54419 0 - 1.1573 > 23 16 63 47 8.17271 0 - 1.1573 > 24 16 63 47 7.83218 0 - 1.1573 > 25 16 63 47 7.5189 0 - 1.1573 > 26 16 63 47 7.22972 0 - 1.1573 > 27 16 81 65 9.62824 4.5 0.076456 4.9428 > 28 16 118 102 14.5693 148 0.427273 4.34095 > 29 16 119 103 14.2049 4 1.57897 4.31414 > 30 16 132 116 15.4645 52 2.25424 4.01492 > 31 16 133 117 15.0946 4 0.974652 3.98893 > 32 16 133 117 14.6229 0 - 3.98893 > Total time run: 32.575351 > Total writes made: 133 > Write size: 4194304 > Bandwidth (MB/sec): 16.331 > > Stddev Bandwidth: 31.8794 > Max bandwidth (MB/sec): 148 > Min bandwidth (MB/sec): 0 > Average Latency: 3.91583 > Stddev Latency: 7.42821 > Max latency: 25.24 > Min latency: 0.036475 > > Im think problem not in pg. This output of ceph pg dump > > http://pastebin.com/BqLsyMBC Well, that did improve it a bit; but yes, I think there's something else going on. Just wanted to verify. :) > > I have still no idea. > > All the best. Alex > > > > 2012/11/4 Gregory Farnum <greg@xxxxxxxxxxx>: >> On Sun, Nov 4, 2012 at 10:58 AM, Aleksey Samarin <nrg3tik@xxxxxxxxx> wrote: >>> Hi all >>> >>> Im planning use ceph for cloud storage. >>> My test setup is 2 servers connected via infiniband 40Gb, 6x2Tb disks per node. >>> Centos 6.2 >>> Ceph 0.52 from http://ceph.com/rpms/el6/x86_64 >>> This is my config http://pastebin.com/Pzxafnsm >>> journal on tmpfs >>> well, im create bench pool and test it: >>> ceph osd pool create bench >>> rados -p bench bench 30 write >>> >>> Total time run: 43.258228 >>> Total writes made: 151 >>> Write size: 4194304 >>> Bandwidth (MB/sec): 13.963 >>> Stddev Bandwidth: 26.307 >>> Max bandwidth (MB/sec): 128 >>> Min bandwidth (MB/sec): 0 >>> Average Latency: 4.48605 >>> Stddev Latency: 8.17709 >>> Max latency: 29.7957 >>> Min latency: 0.039435 >>> >>> when i do rados -p bench bench 30 seq >>> Total time run: 20.626935 >>> Total reads made: 275 >>> Read size: 4194304 >>> Bandwidth (MB/sec): 53.328 >>> Average Latency: 1.19754 >>> Max latency: 7.0215 >>> Min latency: 0.011647 >>> >>> I tested the single drive via dd if=/dev/zero of=/mnt/hdd2/testfile >>> bs=1024k count=20000 >>> result: 158 MB/sec >>> >>> Anyone can tell me why such a weak performance? Maybe I missed something? >> >> Can you run "ceph tell osd \* bench" and report the results? (It'll go >> to the "central log" which you can keep an eye on if you run "ceph -w" >> in another terminal.) >> I think you also didn't create your bench pool correctly; it probably >> only has 8 PGs which is not going to perform very well with your disk >> count. Try "ceph pool create bench2 120" and run the benchmark against >> that pool. The extra number at the end tells it to create 120 >> placement groups. >> -Greg -- 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
