Kannan Muthukkaruppan created HBASE-6981:
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Summary: multiple commit logs per region server
Key: HBASE-6981
URL: https://issues.apache.org/jira/browse/HBASE-6981
Project: HBase
Issue Type: New Feature
Reporter: Kannan Muthukkaruppan
Assignee: Kannan Muthukkaruppan
For write dominated workloads, the fact that we have only 1 commit log per
server artificially limits the aggregate throughput to that of one disk (this
is especially true if we do true FS level syncs on each datanode, or even
frequent intermittent FS level syncs as data is being written to each block).
We could consider allowing a configurable number of commit logs per server
(perhaps something close to or slightly less than the number of disks per
server), and we could shard regions on the server, by maybe just a simple
modulo scheme, into those commit logs.
[A quick way to experiment with the same might be to run multiple region server
instances per server; but might be better operationally to package the feature
into a single region server.]
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