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T Jake Luciani commented on CASSANDRA-6809:
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bq. All in all it's not a trivial change if we want to do it right, and it is
probably not going to benefit that many users, so I'm inclined to put this one
on the back burner for now.
I'm inclined to agree, I'm not sure how big the gain would be so I'd like to
experiment first anyway.
> Compressed Commit Log
> ---------------------
>
> Key: CASSANDRA-6809
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6809
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Benedict
> Assignee: T Jake Luciani
> Priority: Minor
> Labels: performance
> 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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