Hi , I'm glad to know that it happened not only to me. Though it is unharmful, it seems like kind of bug... Are there any Ceph developers who know how exactly is the implementation of "ceph osd perf" command? Is the leap second really responsible for this behavior? Thanks.
Sincerely, Craig Chi On 2017-01-04 19:55, Alexandre DERUMIER<aderum...@odiso.com>wrote: > yes, same here on 3 productions clusters. no impact, but a nice happy new > year alert ;) Seem that google provide ntp servers to avoid brutal 1 second > leap https://developers.google.com/time/smear ----- Mail original ----- De: > "Craig Chi"<craig...@synology.com>À: > "ceph-users"<ceph-users@lists.ceph.com>Envoyé: Mercredi 4 Janvier 2017 > 11:26:21 Objet: [ceph-users] High OSD apply latency right after new year (the > leap second?) Hi List, Three of our Ceph OSDs got unreasonably high latency > right after the first second of the new year (2017/01/01 00:00:00 UTC, I have > attached the metrics and I am in UTC+8 timezone). There is exactly a pg > (size=3) just contains these 3 OSDs. The OSD apply latency is usually up to > 25 minutes, and I can also see this large number randomly when I execute > "ceph osd perf" command. But the 3 OSDs does not have strange behavior and > are performing fine so far. I have no idea how "ceph osd perf" is > implemented, but does it have relation to the leap second this year? Since > the cluster is not on production, and the developers were all celebrating new > year at that time, I can not think of other possibilities. Do your cluster > also get this interestingly unexpected new year's gift too? Sincerely, Craig > Chi _______________________________________________ ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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