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Holger Hoffstätte commented on CASSANDRA-2478:
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Sylvain, thanks for the explanation - makes perfect sense, though I disagree
:-) In my experiene every protocol that starts with fully-synchronous
interactions eventually has to bite that bullet. I agree though that it's not
the most important thing right now and other ways of coordinating
client<->cluster interactions could be much more beneficial and efficient.
As for response frames I don't see how you could handle two interleaved queries
(first slow, second fast but "blocked from returning" by the previous one)
without command/response correlation; there can only be a single query to a
node in flight at a time.
> Custom CQL protocol/transport
> -----------------------------
>
> Key: CASSANDRA-2478
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2478
> Project: Cassandra
> Issue Type: New Feature
> Components: API, Core
> Reporter: Eric Evans
> Assignee: Sylvain Lebresne
> Priority: Minor
> Labels: cql
> Fix For: 1.2
>
> Attachments: cql_binary_protocol, cql_binary_protocol-v2
>
>
> A custom wire protocol would give us the flexibility to optimize for our
> specific use-cases, and eliminate a troublesome dependency (I'm referring to
> Thrift, but none of the others would be significantly better). Additionally,
> RPC is bad fit here, and we'd do better to move in the direction of something
> that natively supports streaming.
> I don't think this is as daunting as it might seem initially. Utilizing an
> existing server framework like Netty, combined with some copy-and-paste of
> bits from other FLOSS projects would probably get us 80% of the way there.
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