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From Sean Busbey <bus...@apache.org>
Subject Re: [DISCUSS] What we expect in upgrades to HBase 2.0.0
Date Sat, 28 Oct 2017 03:42:01 GMT
I'd like to make downgrades a non-goal. I'd love us to support
downgrades eventually, but that's a feature in its own right and I
don't think we have time to get it done and still have a 2.0.0 GA in a
reasonable time frame.

On Fri, Oct 27, 2017 at 10:40 PM, Sean Busbey <busbey@apache.org> wrote:
> A recent JIRA about our hfile format[1] has got me thinking about
> expectations for upgrading. The specifics of that JIRA aren't terribly
> important; it's the general issue I want to talk about. A
> simplification of the mismatch in expectations between two groups is
> that some folks place the bar for "we support rolling upgrade" at
> rolling upgrade from 1.y.z* versions generally and others are
> comfortable requiring an initial upgrade to some later 1.y.z version
> first.
> Have we documented what our goals are for upgrades this major release?
> Do we know what we have to do to get there? I've seen a few one-off
> JIRAs to fix particular problems, but not really a plan.
> We should discuss here a bit.
> When things have some consensus is anyone willing to take point on
> writing up the results in a scope document of sorts? I have a few good
> examples to point you to, though they're all for features.
> [1]: https://issues.apache.org/jira/browse/HBASE-19052

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