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From Stefan Richter <s.rich...@data-artisans.com>
Subject Re: [POLL] Dropping savepoint format compatibility for 1.1.x in the Flink 1.4.0 release
Date Wed, 02 Aug 2017 07:12:25 GMT

> Am 28.07.2017 um 16:03 schrieb Stephan Ewen <sewen@apache.org>:
> Seems like no one raised a concern so far about dropping the savepoint format compatibility
for 1.1 in 1.4.
> Leaving this thread open for some more days, but from the sentiment, it seems like we
should go ahead?
> On Wed, Jul 12, 2017 at 4:43 PM, Stephan Ewen <sewen@apache.org <mailto:sewen@apache.org>>
> Hi users!
> Flink currently maintains backwards compatibility for savepoint formats, which means
that savepoints taken with Flink version 1.1.x and 1.2.x can be resumed in Flink 1.3.x
> We are discussing how many versions back to support. The proposition is the following:
>    Suggestion: Flink 1.4.0 will be able to resume savepoints taken with version 1.3.x
and 1.2.x, but not savepoints from version 1.1.x and 1.0.x
> The reason for that is that there is a lot of code mapping between the completely different
legacy format (1.1.x, not re-scalable) and the key-group-oriented format (1.2.x onwards, re-scalable).
It would greatly help the development of state and checkpointing features to drop that old
> Please let us know if you have concerns about that.
> Best,
> Stephan

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