Noble Paul created SOLR-5476:
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Summary: Roles per node
Key: SOLR-5476
URL: https://issues.apache.org/jira/browse/SOLR-5476
Project: Solr
Issue Type: Sub-task
Reporter: Noble Paul
In a very large cluster the OverSeer is likely to be overloaded.If the same
node is a serving a few other shards it can lead to OverSeer getting slowed
down due to GC pauses , or simply too much of work . If the cluster is really
large , it is possible to dedicate high end h/w for OverSeers
It works as a new collection admin command
command=assignRole&whitelist=overseer&blacklist=leader&blacklist=replica&node=node_name
If a node is whitelisted for overseer it gets preference over others when
overseer election takes place. If no whitelisted servers are available another
random node will be picked up
if the node is blacklisted for leade/replica , it won't be assigned any new
shards
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