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https://issues.apache.org/jira/browse/CASSANDRA-5511?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13640385#comment-13640385
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Jonathan Ellis commented on CASSANDRA-5511:
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bq. want me to do it again for ic?
That would be great. (Ideally I'd like to leave the code to generate it
commented out like we do with LegacySSTableTest.)
bq. does this mean we will support upgrading 1.2 -> 2.1?
I guess we can see how much it bugs us by then. :)
> 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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