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From "Philip Thompson (JIRA)" <>
Subject [jira] [Updated] (CASSANDRA-12017) Allow configuration of inter DC compression
Date Fri, 17 Jun 2016 15:30:05 GMT


Philip Thompson updated CASSANDRA-12017:
    Fix Version/s: 3.x

> Allow configuration of inter DC compression 
> --------------------------------------------
>                 Key: CASSANDRA-12017
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Thom Valley
>             Fix For: 3.x
> With larger and more extensively geographically distributed clusters, users are beginning
to need the ability to reduce bandwidth consumption as much as possible.
> With larger workloads, the limits of even large intercontinental data links (55MBps is
pretty typical) are beginning to be stretched.
> InterDC SSL is currently hard coded to use the fastest (not highest) compression settings.
 LZ4 is a great option, but being able to raise the compression at the cost of some additional
CPU may save as much as 10% (perhaps slightly more depending on the data).  10% of a 55MBps
link, if running at or near capacity is substantial.
> This also has a large impact on the overhead and rate possible for instantiating new
DCs as well as rebuilding a DC after a failure.

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