[jira] [Updated] (CASSANDRA-8634) Multi-thread commit log compression

["C. Scott Andreas (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-8634?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

C. Scott Andreas updated CASSANDRA-8634:
----------------------------------------
    Component/s: Compression

> Multi-thread commit log compression
> -----------------------------------
>
>                 Key: CASSANDRA-8634
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8634
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Compression
>            Reporter: Ariel Weisberg
>            Priority: Major
>              Labels: performance
>
> The initial commit log compression implementation can do about 240 megabytes/second (uncompressed input) on a fast (500 megabytes/sec)  SSD.
> This is basically what I measured as the throughput of LZ4 against the same data.
> Assuming a 1.5x compression ratio that is 160 megabytes/second of output. Enough to saturate a spinning disk, but not an SSD.



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