[SOLR-12826] Add a default policy to equally distribute replicas of a shard

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Component/s: AutoScaling
• Assignee: Unassigned
• Reporter: Varun Thacker
• Created: 03/Oct/18 02:43
• Updated: 08/Jun/19 15:01
• Resolved: 23/Oct/18 21:48

Description

We should have a policy to the effect of "maxShardsPerHost=1" by default.

I created a 4 node cluster , created lots of collection on node1 and node2.

Then used the suggestions to move replicas. I ended up with a scenario where both replicas of a collection was on one node.

So if we create a policy such that this can never happen as maxShardsPerHost=1 was the default

{"replica": "<2", "shard" : "#EACH" , "node" :"#ANY", "strict" : "false" }

Issue Links

• is superceded by: SOLR-12845 Add a default cluster policy