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From "Jonathan Ellis (JIRA)" <>
Subject [jira] [Resolved] (CASSANDRA-6570) Compatibility mode for 2.1
Date Fri, 10 Jan 2014 21:05:52 GMT


Jonathan Ellis resolved CASSANDRA-6570.

       Resolution: Later
    Fix Version/s:     (was: 2.1)
         Assignee:     (was: Marcus Eriksson)

... Aleksey points out that besides 2PC, CASSANDRA-6504 and CASSANDRA-5202 and possibly others
are deal breakers here.

Looks like it's too late to retrofit this into 2.1, but we'll make it a goal for 3.0.

> Compatibility mode for 2.1
> --------------------------
>                 Key: CASSANDRA-6570
>                 URL:
>             Project: Cassandra
>          Issue Type: Task
>          Components: Core
>            Reporter: Jonathan Ellis
> Upgrading to a new major Cassandra release is a big commitment, because once on a new
version you can't downgrade again because we write new-version sstables.
> Let's add an option to write old-version sstables so that users can try upgrading a single
2.1 RC node in a 2.0 cluster with the safety net of being able to back it out if anything
goes wrong.

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