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Pavel Yaskevich commented on CASSANDRA-5863:
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Indeed it comes with expense of utilizing inode cache more but not having to
worry about keeping CompressionInfo in memory and all other effects and
complexities which come from current state of compression might be worth it.
We'll definitely need some experimental results to back it up but even if it
doesn't work out the way I expect it still would be an interesting experiment
to make.
> In process (uncompressed) page cache
> ------------------------------------
>
> Key: CASSANDRA-5863
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5863
> Project: Cassandra
> Issue Type: Sub-task
> Reporter: T Jake Luciani
> Assignee: Branimir Lambov
> Labels: performance
> Fix For: 3.x
>
>
> Currently, for every read, the CRAR reads each compressed chunk into a
> byte[], sends it to ICompressor, gets back another byte[] and verifies a
> checksum.
> This process is where the majority of time is spent in a read request.
> Before compression, we would have zero-copy of data and could respond
> directly from the page-cache.
> It would be useful to have some kind of Chunk cache that could speed up this
> process for hot data, possibly off heap.
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