On 10/1/19 8:20 AM, Lars Täuber wrote: > Mon, 30 Sep 2019 15:21:18 +0200 > Janne Johansson <icepic.dz@xxxxxxxxx> ==> Lars Täuber <taeuber@xxxxxxx> : >>> >>> I don't remember where I read it, but it was told that the cluster is >>> migrating its complete traffic over to the public network when the cluster >>> networks goes down. So this seems not to be the case? >>> >> >> Be careful with generalizations like "when a network acts up, it will be >> completely down and noticeably unreachable for all parts", since networks >> can break in thousands of not-very-obvious ways which are not 0%-vs-100% >> but somewhere in between. >> > > Ok. I ask my question in a new way. > What does ceph do, when I switch off all switches of the cluster network? -> confused cluster, osds down > Does ceph handle this silently without interruption? Does the heartbeat systems use the public network as a failover automatically? No and no. The osds uses the cluster network for replication and heartbeats [1] (between osds) - if the heartbeat fails they try to report the other osds to the mon as down. As far as i know there is no failover to the public network. Michel. [1] https://docs.ceph.com/docs/mimic/rados/configuration/network-config-ref/#cluster-network _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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