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https://issues.apache.org/jira/browse/BEAM-3061?focusedWorklogId=259794&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-259794
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ASF GitHub Bot logged work on BEAM-3061:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 13/Jun/19 17:45
            Start Date: 13/Jun/19 17:45
    Worklog Time Spent: 10m 
      Work Description: chamikaramj commented on issue #7805: [BEAM-3061] Done 
notifications for BigtableIO.Write
URL: https://github.com/apache/beam/pull/7805#issuecomment-501809102
 
 
   Agree with what @steveniemitz said. BTW will it make sense to group these 
objects so that we only output one per window not one per batch ? Also it might 
also make sense to introduce something like 'SpannerWriteResult' so that we 
only output these objects if users explicitly ask for additional output. 
(specially if we do grouping due to the cost of additional shuffle).
   
   I think we should summarize the discussion here in dev list to in case 
others have additional opinions. This might end up being a pattern for other 
sinks.
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 259794)
    Time Spent: 7.5h  (was: 7h 20m)

> BigtableIO should support emitting a sentinel "done" value when a bundle 
> completes
> ----------------------------------------------------------------------------------
>
>                 Key: BEAM-3061
>                 URL: https://issues.apache.org/jira/browse/BEAM-3061
>             Project: Beam
>          Issue Type: Improvement
>          Components: io-java-gcp
>            Reporter: Steve Niemitz
>            Assignee: Steve Niemitz
>            Priority: Major
>          Time Spent: 7.5h
>  Remaining Estimate: 0h
>
> There was some discussion of this on the dev@ mailing list [1].  This 
> approach was taken based on discussion there.
> [1] 
> https://lists.apache.org/thread.html/949b33782f722a9000c9bf9e37042739c6fd0927589b99752b78d7bd@%3Cdev.beam.apache.org%3E



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