Github user StefanRRichter commented on the issue:
https://github.com/apache/flink/pull/3801
About 3., i think the self-consolidating/pruning nature of RocksDB w.r.t.
the SSTables makes it feasible to make all checkpoints incremental, because the
delta does not grow indefinately for a constant backend size. All savepoints
would be full and self-contained.
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