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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-241) move daemon to framed transport (thrift)
Date Sat, 27 Jun 2009 22:46:47 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-241?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12724902#action_12724902
] 

Jonathan Ellis commented on CASSANDRA-241:
------------------------------------------

I think the consensus on the list was that we should make the transport to use an option given
that the following Thrift languages lack the Framed option.

C#
Cocoa
Haskell
Ocaml
Smalltalk

> move daemon to framed transport (thrift)
> ----------------------------------------
>
>                 Key: CASSANDRA-241
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-241
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 0.4
>            Reporter: Eric Evans
>            Assignee: Eric Evans
>             Fix For: 0.4
>
>         Attachments: 241.txt
>
>
> The framed transports in thrift wrap the underlying transport to prepend the message
size as a 4 byte value.  There are purported benefits to buffering, but the main purpose of
these wrappers is to allow non-blocking servers to perform reads without deserialization.
Of course, if the server transport is framed, the client's must be as well, and vice versa,
(framed and non-framed transports are incompatible). 
> CassandraDaemon is currently a threaded server with the default transport, I believe
we should change it to being framed, for compatibility with non-blocking clients (this actually
came up during an attempt to use a Twisted client).
> This will break all existing client apps, (even if fixing them is trivial).

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