[ClusterLabs] Multisite Clusters: how many servers?

[Kai Dupke]

On 12/07/2015 09:57 PM, Michael Schwartzkopff wrote:
> Hi,
> 
> it is possible / advisable to set up a multisite cluster with booth with one 
> server at each site?
> 
> So having three servers all together?


Yes. No. Might be.
^L
The concept of geo cluster is cluster of cluster, where the local
cluster handles local issue using local timing (seconds), while the geo
handles geo issues with much wider timing constrains (minutes, if not
hour(s)).

A geo setup needs a minimum of 2 sites + an arbitrator site.

The arbitrator can be a single node (even a small VM) with the cluster
stack running, if only used as a plain arbitrator.

In theory you could run without an arbitrator, if the admins are the
arbitrators.

The other sites needs a cluster stack running, of course this will work
with a single node cluster, too.

Wonder what setup needs geo redundancy but no local clusters, or what
setup needs booth but isn't geo.

greetings
Kai Dupke
Senior Product Manager
Server Product Line
-- 
Sell not virtue to purchase wealth, nor liberty to purchase power.
Phone:  +49-(0)5102-9310828     Mail: kdupke at suse.com
Mobile: +49-(0)173-5876766      WWW:  www.suse.com

SUSE Linux GmbH - Maxfeldstr. 5 - 90409 Nuernberg (Germany)
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