QOS for META table access
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Key: HBASE-2782
URL: https://issues.apache.org/jira/browse/HBASE-2782
Project: HBase
Issue Type: Improvement
Components: regionserver
Reporter: Todd Lipcon
I'd like to brainstorm some ideas on how we can prioritize reads and writes to
META above reads and writes to other tables. I've noticed that if the
regionserver hosting META is under heavy load, then lots of other operations
take much longer than they should. For example, I'm currently running 120
threads of YCSB across 3 client nodes hitting a 5-node cluster. Doing a full
scan of META (only 600 rows) takes upwards of 30 seconds in the shell, since
all of the handler threads are tied up and there's a long RPC queue.
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