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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-5511) Clean up backwards compatibility complexity for 2.0
Date Wed, 24 Apr 2013 03:39:15 GMT
Jonathan Ellis created CASSANDRA-5511:
-----------------------------------------

             Summary: Clean up backwards compatibility complexity for 2.0
                 Key: CASSANDRA-5511
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5511
             Project: Cassandra
          Issue Type: Bug
          Components: Core
            Reporter: Jonathan Ellis
            Assignee: Jonathan Ellis
             Fix For: 2.0


We've supported rolling upgrades (network-compatible for read/write operations) for several
releases, but both 1.0 -> 1.1 and 1.1 -> 1.2 required being on a recent release of the
immediately prior major series for this to work as desired.

Meanwhile, we still support reading sstables at least back to 0.6 and possibly even earlier.
 This makes dealing with changes to the sstable quite challenging; the recently written-and-reverted
CASSANDRA-5487 comes to mind.

2.0 is a good place to drop support for sstables older than 1.2.5.  Our experience with network
compatibility demonstrates that this is not an unreasonable burden to impose, and the major
version number change suggests that this is a logical time to make such a change.

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