On 2014-02-27T11:05:21, Digimer <li...@alteeve.ca> wrote: > So regardless of quorum, fencing is required. It is the only way to > reliably avoid split-brains. Unfortunately, fencing doesn't work on stretch > clusters.
For a two node stretch cluster, sbd can also be used reliably as a fencing mechanism. It essentially uses the standard iSCSI protocol as a quorum mechanism. Export one (1MB or so) iSCSI LU from each site to the other, and in the best case, host one at a 3rd site as tie-breaker. Then run SBD across these. booth is striving to address even longer distances, where each site is a truly separate cluster (e.g., independent corosync/pacemaker setups, totem not running across the gap). Regards, Lars -- Architect Storage/HA SUSE LINUX Products GmbH, GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer, HRB 21284 (AG Nürnberg) "Experience is the name everyone gives to their mistakes." -- Oscar Wilde _______________________________________________ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems