[jira] [Created] (IMPALA-9020) Move scan range queues to fragment-level and do dynamic scheduling within a node

["Tim Armstrong (Jira)" <ji...@apache.org>]

Tim Armstrong created IMPALA-9020:
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             Summary: Move scan range queues to fragment-level and do dynamic scheduling within a node
                 Key: IMPALA-9020
                 URL: https://issues.apache.org/jira/browse/IMPALA-9020
             Project: IMPALA
          Issue Type: Sub-task
          Components: Backend
            Reporter: Tim Armstrong


It would be nice to dynamically load balance scans between finstances on a node. There's no particular reason why we can't do that - the code is already set up, in HDFS, to pull scan ranges out of a queue.

I think this will be simpler to do once we don't have to support the "old" multithreaded scans, so I'm including this in later cleanup.



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