Running a benchmark : rados bench -p cephfs_data 300 write --no-cleanup While watching ceph client io: ceph -w
I get different numbers. The output form rados bench is as follows: Total time run: 300.108725 Total writes made: 66306 Write size: 4194304 Bandwidth (MB/sec): 883.760 Stddev Bandwidth: 65.2804 Max bandwidth (MB/sec): 968 Min bandwidth (MB/sec): 0 Average Latency: 0.0724089 Stddev Latency: 0.0415512 Max latency: 0.674297 Min latency: 0.0299922 While watching the client io it shoots up to around 1900 MB/s: 2015-05-18 16:17:16.416059 mon.0 [INF] pgmap v774: 4096 pgs: 4096 active+clean; 203 GB data, 607 GB used, 173 TB / 174 TB avail; 1870 MB/s wr, 467 op/s The max bandwidth that rados reported was 968 MB/s. The pool is rep 3 with 48 OSDs 4096 PGs. Any thoughts?
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