Github user gyfora commented on the issue: https://github.com/apache/flink/pull/3801 Hi Thanks for the nice effort! I only skimmed through the changes to get the main idea (I will do a more thorough review in the next days) but I have some initial questions :) 1. You mentioned and it looks like that incremental snapshots cannot be rescaled as it checkpoints the files directly for multiple keygroups together. How is this constraint enforced? Will the job fail if we try to rescale it? 2. When you restore from a full snapshot will the next incremental snapshot contain all the files or just the diffs? 3. How do you plan for users to trigger the incremental snapshot operation? I guess the question goes both for checkpoints and savepoints. For example every n-th checkpoint is a full snapshot. And users could use flag maybe to indicate whether the savepoint should be incremental? Cheers, Gyula
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