[ClusterLabs] Antw: Re: Antw: Unexpected Resource movement after failover

Vladislav Bogdanov bubble at hoster-ok.com
Fri Oct 21 15:27:37 EDT 2016

21.10.2016 19:34, Andrei Borzenkov wrote:
> 14.10.2016 10:39, Vladislav Bogdanov пишет:
>> use of utilization (balanced strategy) has one caveat: resources are
>> not moved just because of utilization of one node is less, when nodes
>> have the same allocation score for the resource. So, after the
>> simultaneus outage of two nodes in a 5-node cluster, it may appear
>> that one node runs two resources and two recovered nodes run
>> nothing.
> I call this a feature. Every resource move potentially means service
> outage, so it should not happen without explicit action.

In a case I describe that moves could be easily prevented by using 
stickiness (it increases allocation score on a current node).
The issue is that it is impossible to "re-balance" resources in 
time-frames when stickiness is zero (over-night maintenance window).

>> Original 'utilization' strategy only limits resource placement, it is
>> not considered when choosing a node for a resource.
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