[
https://issues.apache.org/jira/browse/BEAM-9268?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Niel Markwick resolved BEAM-9268.
---------------------------------
Resolution: Fixed
> SpannerIO: Better documentation and warning about creating tables in the
> pipeline
> ---------------------------------------------------------------------------------
>
> Key: BEAM-9268
> URL: https://issues.apache.org/jira/browse/BEAM-9268
> Project: Beam
> Issue Type: Improvement
> Components: io-go-gcp
> Affects Versions: 2.16.0, 2.17.0, 2.18.0, 2.19.0
> Reporter: Niel Markwick
> Assignee: Niel Markwick
> Priority: Major
> Labels: google-cloud-spanner, perfomance
> Fix For: 2.20.0
>
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> The javadoc for SpannerIO.Write mentions in passing that the transform needs
> to know the DB schema for optimal performance. If the schema is created
> within the pipeline, then there is a race between the schema being created
> and SpannerIO reading it, leading to a potential performance penalty if
> SpannerIO does not know about the existence of some tables.
>
> Javadoc needs to make this clearer and more explicit, and point the user at
> the Write.withSchemaReadySignal().
>
> Pipeline needs to raise (rate limited) warnings if it sees writes being made
> to tables it does not know about (warnings can refer back to javadocs)
>
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
