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Posted to issues@flink.apache.org by "Stefan Richter (JIRA)" <ji...@apache.org> on 2017/05/30 15:04:04 UTC

[jira] [Created] (FLINK-6776) Use skip instead of seek for small forward repositioning in DFS streams

Stefan Richter created FLINK-6776:
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             Summary: Use skip instead of seek for small forward repositioning in DFS streams
                 Key: FLINK-6776
                 URL: https://issues.apache.org/jira/browse/FLINK-6776
             Project: Flink
          Issue Type: Improvement
          Components: State Backends, Checkpointing
            Reporter: Stefan Richter
            Assignee: Stefan Richter


Reading checkpoint meta data and finding key-groups in restores sometimes require to seek in input streams. Currently, we always use a seek, even for small position changes. As small true seeks are far more expensive than small reads/skips, we should just skip over small gaps instead of performing the seek.



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