[
https://issues.apache.org/jira/browse/BEAM-12040?focusedWorklogId=576362&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-576362
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ASF GitHub Bot logged work on BEAM-12040:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 03/Apr/21 00:24
Start Date: 03/Apr/21 00:24
Worklog Time Spent: 10m
Work Description: nehsyc opened a new pull request #14421:
URL: https://github.com/apache/beam/pull/14421
A follow-up PR for #14164. This PR tries to make the runner determined
sharding implementation for unbounded data work with session windows.
Before
input -> group and batch -> write to temp files -> group files by
destination -> finalize and rename
After
input -> GBK -> reify window -> group and batch -> write to temp files ->
group files by {destination, window} -> finalize and rename
As a comparison, fixed sharding implementation:
input -> shard and GBK -> write to temp files -> reshuffle with void key ->
gather bundles -> reshuffle -> finalize and rename
------------------------
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<table>
<thead>
<tr>
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Issue Time Tracking
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Worklog Id: (was: 576362)
Remaining Estimate: 0h
Time Spent: 10m
> WriteFiles withRunnerDeterminedShardingUnbounded doesn't work with session
> windows
> ----------------------------------------------------------------------------------
>
> Key: BEAM-12040
> URL: https://issues.apache.org/jira/browse/BEAM-12040
> Project: Beam
> Issue Type: Improvement
> Components: io-java-files
> Reporter: Siyuan Chen
> Priority: P2
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Currently the implementation of `withRunnerDeterminedShardingUnbounded` uses
> a stateful DoFn to achieve the grouping and batching of the input elements,
> which doesn't support session windows. One possible way is to add another GBK
> prior to the stateful DoFn to first get session windows merged and reify the
> window before invoking the sateful DoFn.
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