[ClusterLabs] a newbie --question

[Kai Dupke]

On 09/15/2015 07:22 AM, ‪H Yavari‬ ‪ wrote:
> But my issue is that my servers must be pair.

May I kindly ask to explain what is the reason is to request pairs?

Is it because the systems belong to dedicated projects?

Is it because the the apps shall not run on one node because of compute
resource constrains?

Is it because the nodes are separated by distance?

Usually you can get a much higher availability with 4 nodes available if
you allow all apps to run on all nodes, but usually have the apps not on
the same node. This rule allow that up to 3 of the 4 nodes get down, but
the apps are still available (even with less performance, but available).

greetings
Kai Dupke
Senior Product Manager
Server Product Line
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