Noble Paul created SOLR-5475:
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             Summary: Scale OverSeer to work on multiple queues and threads
                 Key: SOLR-5475
                 URL: https://issues.apache.org/jira/browse/SOLR-5475
             Project: Solr
          Issue Type: Sub-task
            Reporter: Noble Paul


As the collections are split to multiple nodes , it is possible to separate out 
the events of each collection to a different queue and each queue can be 
serviced by a separate thread.

It works as follows

* Keep a cluster wide property collectionsPerQ
* When a collection is created it is assigned to a queue-id and that value is 
stored in the state of that collection. all queues reach the max val of 
collectionsPerQ new queues are created
* In the OverSeer one thread is created per queue




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