Parallelize Server Requests on HBase Client
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Key: HBASE-3653
URL: https://issues.apache.org/jira/browse/HBASE-3653
Project: HBase
Issue Type: Improvement
Affects Versions: 0.90.2, 0.92.0
Reporter: Nicolas Spiegelberg
Assignee: Nicolas Spiegelberg
Fix For: 0.90.2, 0.92.0
Vastly improves HBCK performance. Although we are parallelizing
getRegionAssignment() calls, getHRegionConnection()
gets a big lock. Cache misses can be expensive on heavily-loaded servers
because they need to setup a proxy connection. This hurts cache hits on a cache
miss & serializes all cache misses. We should parallelize both situations.
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