[SOLR-12717] Support #EACH for collections so that collection/shard pairs can be uniformly distributed

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Implemented
• Fix Version/s: 7.6, 8.0
• Component/s: AutoScaling
• Assignee: Unassigned
• Reporter: Shalin Shekhar Mangar
• Created: 29/Aug/18 11:49
• Updated: 08/Jun/19 15:01
• Resolved: 09/Oct/18 07:51

Description

See the third goal of the question at https://stackoverflow.com/questions/50839060/solr-autoscaling-add-replicas-on-new-nodes

The user wants to ensure that "Only one replica of each collection should exist on a node". We'd need support for collection:#EACH in a rule to support this use-case.