Benedict created CASSANDRA-6809:
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Summary: Compressed Commit Log
Key: CASSANDRA-6809
URL: https://issues.apache.org/jira/browse/CASSANDRA-6809
Project: Cassandra
Issue Type: Improvement
Reporter: Benedict
Assignee: Benedict
Priority: Minor
Fix For: 3.0
It seems an unnecessary oversight that we don't compress the commit log. Doing
so should improve throughput, but some care will need to be taken to ensure we
use as much of a segment as possible. I propose decoupling the writing of the
records from the segments. Basically write into a (queue of) DirectByteBuffer,
and have the sync thread compress, say, ~64K chunks every X MB written to the
CL (where X is ordinarily CLS size), and then pack as many of the compressed
chunks into a CLS as possible.
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