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? All the best, Alex! -- 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
