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From gyfora <...@git.apache.org>
Subject [GitHub] flink pull request: Out-of-core state backend for JDBC databases
Date Tue, 03 Nov 2015 12:26:23 GMT
Github user gyfora commented on the pull request:

    You are right about the checkpointIDs being ignored. I don't see why we need to bother
with changing the id semantics, the timestamps also serve as checkpoint Ids perfectly (in
fact we could drop the checkpoint ID everywhere in Flink and just keep the timestamp).
    The good thing about timestamps is that they are not incremental, meaning that if the
first checkpoint have ts = 100 and the second has ts = 5100 then we can write the intermediate
updates with ts 101, 102 ... while maintaining uniqueness and monotonicity. This is something
that we use here and that is why I am using timestamps instead of ids.

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