Steve Loughran created SLIDER-825:
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Summary: strict placement should skip the de-affinitisation process
Key: SLIDER-825
URL: https://issues.apache.org/jira/browse/SLIDER-825
Project: Slider
Issue Type: Sub-task
Components: appmaster
Affects Versions: Slider 0.70
Reporter: Steve Loughran
Assignee: Steve Loughran
Fix For: Slider 0.80
The strict placement rules are only used after the role history scan has
filtered the placement history to discard nodes more than once. This may not be
what strict placement prefers.
There's a couple of problems implementing this.
# persistence only logs whether a node was used or not; the saved data format
would need to be extended with a new optional field of placement count.
# on a clean teardown the history is saved too many times, and will log a
reduced placement count as the cluster shrinks.
It may be that the slider-managed escalation of SLIDER-799 renders strict
placement moot -or it may be that the behaviour proposed in this JIRA is
desired there too.
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