Hello, after some trial and error we concluded that if we start the 6 stopped OSD daemons with a delay of 1 minute, we do not experience slow requests (threshold is set on 30 sec), althrough there are some ops that last up to 10s which is already high enough. I assume that if we spread the delay more, the slow requests will vanish. The possibility of not having tuned our setup to the most finest detail is not zeroed out but I wonder if at any way we miss some ceph tuning in terms of ceph configuration. We run firefly latest stable version. Regards, Kostis On 13 July 2015 at 13:28, Kostis Fardelas <dante1234@xxxxxxxxx> wrote: > Hello, > after rebooting a ceph node and the OSDs starting booting and joining > the cluster, we experience slow requests that get resolved immediately > after cluster recovers. It is improtant to note that before the node > reboot, we set noout flag in order to prevent recovery - so there are > only degraded PGs when OSDs shut down- and let the cluster handle the > OSDs down/up in the lightest way. > > Is there any tunable we should consider in order to avoid service > degradation for our ceph clients? > > Regards, > Kostis _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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