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From "Joshua McKenzie (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-6246) EPaxos
Date Tue, 15 Aug 2017 16:02:01 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-6246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16127426#comment-16127426
] 

Joshua McKenzie commented on CASSANDRA-6246:
--------------------------------------------

[~geagle]: given that this a) needs a rebase, and b) is a [massive patch|https://github.com/apache/cassandra/compare/trunk...bdeggleston:CASSANDRA-6246-trunk]
that has yet to be reviewed, I'd expect there's going to be a substantial delay for this to
be ready for merge. Not to put words in Blake's mouth, but I'd assume a post 4.0 world.

> EPaxos
> ------
>
>                 Key: CASSANDRA-6246
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6246
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Jonathan Ellis
>            Assignee: Blake Eggleston
>              Labels: messaging-service-bump-required
>             Fix For: 4.x
>
>
> One reason we haven't optimized our Paxos implementation with Multi-paxos is that Multi-paxos
requires leader election and hence, a period of unavailability when the leader dies.
> EPaxos is a Paxos variant that requires (1) less messages than multi-paxos, (2) is particularly
useful across multiple datacenters, and (3) allows any node to act as coordinator: http://sigops.org/sosp/sosp13/papers/p358-moraru.pdf
> However, there is substantial additional complexity involved if we choose to implement
it.



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