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https://issues.apache.org/jira/browse/BEAM-5445?focusedWorklogId=147211&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-147211
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ASF GitHub Bot logged work on BEAM-5445:
----------------------------------------
Author: ASF GitHub Bot
Created on: 24/Sep/18 17:30
Start Date: 24/Sep/18 17:30
Worklog Time Spent: 10m
Work Description: nielm opened a new pull request #6478: [BEAM-5445]
[BEAM-4796] SpannerIO: Only batch on the current bundle. Adds streaming support
URL: https://github.com/apache/beam/pull/6478
Rewrite the mechanism whereby SpannerIO batches the incoming mutations.
Previously the entire input was scanned, assigned partitions and GroupByKey
before writing. This required that the input was bounded, large amounts of disk
space, and the entire input had to be read before any writes started.
With this change, the input is only sorted/batched over the current Bundle
(or 1000x max batch size, whichever is smaller).
This has the following benefits:
- Significantly decreases latency before the first row is written (down to a
few seconds after the pipeline is started)
- Allows the SpannerIO writer to be used in a streaming pipeline
- Reduces the amount of worker disk space required for large sources
- Significantly improves the write speed for large sources
@chamikaramj
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Post-Commit Tests Status (on master branch)
------------------------------------------------------------------------------------------------
Lang | SDK | Apex | Dataflow | Flink | Gearpump | Samza | Spark
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Go | [](https://builds.apache.org/job/beam_PostCommit_Go_GradleBuild/lastCompletedBuild/)
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Java | [](https://builds.apache.org/job/beam_PostCommit_Java_GradleBuild/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Apex_Gradle/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Dataflow_Gradle/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Flink_Gradle/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Gearpump_Gradle/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Samza_Gradle/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Spark_Gradle/lastCompletedBuild/)
Python | [](https://builds.apache.org/job/beam_PostCommit_Python_Verify/lastCompletedBuild/)
| --- | [](https://builds.apache.org/job/beam_PostCommit_Py_VR_Dataflow/lastCompletedBuild/)
</br> [](https://builds.apache.org/job/beam_PostCommit_Py_ValCont/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PostCommit_Python_VR_Flink/lastCompletedBuild/)
| --- | --- | ---
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Issue Time Tracking
-------------------
Worklog Id: (was: 147211)
Time Spent: 50m (was: 40m)
> Update SpannerIO to support unbounded writes
> --------------------------------------------
>
> Key: BEAM-5445
> URL: https://issues.apache.org/jira/browse/BEAM-5445
> Project: Beam
> Issue Type: Improvement
> Components: io-java-gcp
> Reporter: Chamikara Jayalath
> Priority: Major
> Time Spent: 50m
> Remaining Estimate: 0h
>
> Currently, due to a known issue, streaming pipelines that use SpannerIO.Write
> do not actually write to Spanner.
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