[SOLR-12031] Refactor Policy framework to let state changes to be applied to all nodes

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 7.3, 8.0
• Component/s: AutoScaling
• Assignee: Noble Paul
• Reporter: Noble Paul
• Created: 26/Feb/18 04:09
• Updated: 04/Apr/18 21:52
• Resolved: 09/Mar/18 12:39

Description

The framework assumes that all variables will change the values in the same node only. that doesn't have to be the case.

 

for instance  , when a replica for a given shard is a added to a node, it actually increases the search rate in that node and decrease the search rate on other nodes that host the same shard.

 

Issue Links

• relates to: SOLR-12023 Autoscaling policy engine shuffles replicas needlessly and can also suggest nonexistent replicas to be moved