T Jake Luciani created CASSANDRA-5863:
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Summary: Create a Decompressed Chunk Cache
Key: CASSANDRA-5863
URL: https://issues.apache.org/jira/browse/CASSANDRA-5863
Project: Cassandra
Issue Type: Improvement
Components: Core
Reporter: T Jake Luciani
Currently, for every read the CRAR we reads compressed chunks into a byte[],
check sends it to ICompressor and 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. Initially this could be a off heap cache but it would be
great to put these decompressed chunks onto a SSD so the hot data lives on a
fast disk similar to https://github.com/facebook/flashcache.
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