On Thu, 19 Dec 2013, John-Paul Robinson wrote: > What impact does rebooting nodes in a ceph cluster have on the health of > the ceph cluster? Can it trigger rebalancing activities that then have > to be undone once the node comes back up? > > I have a 4 node ceph cluster each node has 11 osds. There is a single > pool with redundant storage. > > If it takes 15 minutes for one of my servers to reboot is there a risk > that some sort of needless automatic processing will begin? By default, we start rebalancing data after 5 minutes. You can adjust this (to, say, 15 minutes) with mon osd down out interval = 900 in ceph.conf. sage > > I'm assuming that the ceph cluster can go into a "not ok" state but that > in this particular configuration all the data is protected against the > single node failure and there is no place for the data to migrate too so > nothing "bad" will happen. > > Thanks for any feedback. > > ~jpr > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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