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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-8896) Investigate upstream changes to compressors to fit contents exactly to one page
Date Mon, 29 Jun 2015 23:46:05 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-8896?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis updated CASSANDRA-8896:
--------------------------------------
    Labels: performance  (was: )

> Investigate upstream changes to compressors to fit contents exactly to one page
> -------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-8896
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8896
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Benedict
>              Labels: performance
>
> For optimal disk performance, it makes most sense to choose our compression boundaries
based on compressed size, not uncompressed. If our compressors could take a target length,
and return the number of source bytes they managed to fit into that space, this would permit
us to lower the number of disk accesses per read. [~blambov]: you've dived into LZ4. How tricky
do you think this might be?



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