Noble Paul created SOLR-6760:
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Summary: New optimized DistributedQueue implementation for overseer
Key: SOLR-6760
URL: https://issues.apache.org/jira/browse/SOLR-6760
Project: Solr
Issue Type: Bug
Reporter: Noble Paul
Assignee: Noble Paul
Currently the DQ works as follows
* read all items in the directory
* sort them all
* take the head and return it
This works well when we have only a handful of items in the Queue. If the items
in the queue is much larger in tens of thousands, this is counterprodcutive
As the overseer queue is a multiple producers + single consumer queue, We can
read them all in bulk and before processing each item , just do a
zk.exists(itemname) and if all is well we don't need to do the fetch all + sort
thing again
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