Hi, we are trying to track down a performance problem with rados that is leading no where. We are using 23 OSDs. Running "ceph osd tell <osd> bench" we are seeing decent performance on each osd. However, running "rados -p rbd bench 120 write -t 1" from a client we only see around 10 MBs. We can increase the number of threads from 1 to 10 and see an increase in 10 MB/s for each new thread up until the network bottlenecks us around 100 MB/s. None of the micro benchmarks showed throughput less than 30 MB/s, so we are a bit at a loss for tracking down this performance issue. Any suggestions? Thanks, -Noah-- 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
