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https://issues.apache.org/jira/browse/CASSANDRA-3127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13286493#comment-13286493
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Marcus Eriksson commented on CASSANDRA-3127:
--------------------------------------------
I have not (yet) tried Snappy for this, should i?
new patch does what you suggest, approach when node A starts communicating with
node B is:
# node A sends the first message uncompressed, but with the compression bit set
in the header (this is only done if it is enabled in the conf and the version
of node B is >= current, but since MessagingService returns current version if
it does not know about the remote node, not sure how effective it is, guess we
get an exception and a reconnect, and then we might know the remote version)
# node A "upgrades" its dataoutputstream to be compressed
# node B gets the first, uncompressed message, sees the compression flag in the
header and upgrades the DataInputStream to be compressed
> 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
> Assignee: Marcus Eriksson
> Priority: Minor
> Attachments:
> 0001-CASSANDRA-3127-compress-messages-between-nodes.patch,
> CASSANDRA-3127.patch, CHECK_SIZES-CASSANDRA-3127.patch
>
>
> 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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