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From "Thom Valley (JIRA)" <>
Subject [jira] [Created] (CASSANDRA-12017) Allow configuration of inter DC compression
Date Thu, 16 Jun 2016 16:16:05 GMT
Thom Valley created CASSANDRA-12017:

             Summary: Allow configuration of inter DC compression 
                 Key: CASSANDRA-12017
             Project: Cassandra
          Issue Type: Improvement
            Reporter: Thom Valley

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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