[jira] [Commented] (CASSANDRA-3127) Message (inter-node) compression

["Chris Burroughs (Commented) (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-3127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13247287#comment-13247287 ] 

Chris Burroughs commented on CASSANDRA-3127:
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bq. On the other side of the spectrum, this is likely always a good choice to compress for say the exchange of merkle trees across data-centers. 

Shouldn't merkle trees (in theory) already be the most information dense representation possible and thus be uncompressable?
                
> Message (inter-node) compression
> --------------------------------
>
>                 Key: CASSANDRA-3127
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3127
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Sylvain Lebresne
>            Priority: Minor
>
> CASSANDRA-3015 adds compression of streams. But it could be useful to also compress some messages.
> Compressing messages is easy, but what may be little bit trickier is when and what messages to compress to get the best performances.
> The simple solution would be to just have it either always on or always off. But for very small messages (gossip?) that may be counter-productive. On the other side of the spectrum, this is likely always a good choice to compress for say the exchange of merkle trees across data-centers. We could maybe define a size of messages after which we start to compress. Maybe the option to only compress for cross data-center messages would be useful too (but I may also just be getting carried away). 

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