Gregory Farnum <gregory.farnum <at> dreamhost.com> writes: > > On Sat, Jan 28, 2012 at 8:52 PM, Madhusudhan > <madhusudhana.u.acharya <at> gmail.com> wrote: > > I have configured ceph in centos5.6 after a > > very long fight. Now, i am in the way > > to evaluate the Ceph. Forget me if my > > question looks amateur. If we consider a > > situation where my core switch fails, > > resulting in n/w failure in entire data > > center. What happens to ceph cluster ? > > will it sustain this n/w failure and comes > > online when the n/w is restored ? > > Hmmm. If your network breaks horribly, you will probably need to > restart the daemons — once their communication breaks they'll start > marking each other down and the monitors will probably accept those > reports once the network starts working again. (Actually, maybe we > should update that so the monitors reject sufficiently old reports.) > But it will be a transient effect; restarting your machines will be > enough to restore service. :) > -Greg > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo <at> vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Thank you Greg for the reply. Do we have to start both osd/mon deamons on all the nodes ? I one of the case, i rebooted my osd node (when it wan running to check the fault tolerance) and when it came online, its journal got corrupted. I had to reinitialize the node by erasing all data in it. And rebooting the entire cluster (in case of n/w failure) doesn't seems to be a good idea for me as clients will start mounting the cluster immediately and start writing or reading from the cluster. -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
