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From "Paulo Motta (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-8895) Compressed sstables should only compress if the win is above a certain threshold, and should use a variable block size
Date Wed, 28 Oct 2015 16:21:28 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-8895?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Paulo Motta updated CASSANDRA-8895:
-----------------------------------
    Assignee:     (was: Paulo Motta)

> Compressed sstables should only compress if the win is above a certain threshold, and
should use a variable block size
> ----------------------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-8895
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8895
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Benedict
>              Labels: performance
>             Fix For: 3.x
>
>
> On performing a flush to disk, we should assess if the data we're flushing will actually
be substantively compressed, and how large the page should be to get optimal compression ratio
versus read latency. Decompressing 64Kb chunks is wasteful when reading small records.



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