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From "Daniel Halperin (JIRA)" <>
Subject [jira] [Updated] (BEAM-347) Progress updates inaccurate for non-uniform keys in Bigtable
Date Sat, 25 Jun 2016 16:50:37 GMT


Daniel Halperin updated BEAM-347:
    Fix Version/s: 0.2.0-incubating

> Progress updates inaccurate for non-uniform keys in Bigtable
> ------------------------------------------------------------
>                 Key: BEAM-347
>                 URL:
>             Project: Beam
>          Issue Type: Improvement
>          Components: sdk-java-gcp
>            Reporter: Ian Zhou
>            Assignee: Daniel Halperin
>            Priority: Minor
>             Fix For: 0.2.0-incubating
> When reading from a Bigtable source with clustered keys, fraction consumed progress updates
are inaccurate. For example, for a range spanning ['a', 'z'], a cluster of keys starting with
the letter 'm' (e.g. 'me100,' ..., 'me999') will be recorded as ~50% complete upon reading
the first key, and will remain at this percentage until the final key has been read. Instead,
the start of the range should be changed to the first key read (e.g. new range ['me100', 'z']).
The end of the range can be changed over time through dynamic work rebalancing.

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