Kannan Muthukkaruppan created HBASE-6980:
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Summary: Parallel Flushing Of Memstores
Key: HBASE-6980
URL: https://issues.apache.org/jira/browse/HBASE-6980
Project: HBase
Issue Type: New Feature
Reporter: Kannan Muthukkaruppan
Assignee: Kannan Muthukkaruppan
For write dominated workloads, single threaded memstore flushing is an
unnecessary bottleneck. With a single flusher thread, we are basically not
setup to take advantage of the aggregate throughput that multi-disk nodes
provide.
* For puts with WAL enabled, the bottleneck is more likely the "single" WAL per
region server. So this particular fix may not buy as much unless we unlock that
bottleneck with multiple commit logs per region server. [Topic for a separate
JIRA.]
* But for puts with WAL disabled (e.g., when using HBASE-5783 style fast bulk
imports), we should be able to support much better ingest rates with parallel
flushing of memstores.
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