Hi, I am looking at the following issue: http://tracker.ceph.com/issues/21375 In summary, during a 'rados bench', impossible latency values (e.g. 9.00648e+07) are suddenly reported. I looked briefly at the code, it seems CLOCK_REALTIME is used, which means that wall clock changes would affect this output. This is a VM cluster, so the hypothesis was that the system's clock was falling behind for some reason, then getting readjusted (that's the only way I could reproduce the issue), which I think is quite possible in a virtual environment. A concern was raised: are there more critical parts of Ceph where a clock jumping around might interfere with the behavior of the cluster? It would be good to know if there are any, and maybe prepare for them? Mohamad _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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