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https://issues.apache.org/jira/browse/BEAM-9188?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Radosław Stankiewicz updated BEAM-9188:
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Resolution: Fixed
Status: Resolved (was: Open)
> Improving speed of splitting for Custom Sources
> -----------------------------------------------
>
> Key: BEAM-9188
> URL: https://issues.apache.org/jira/browse/BEAM-9188
> Project: Beam
> Issue Type: Improvement
> Components: runner-dataflow
> Reporter: Radosław Stankiewicz
> Assignee: Radosław Stankiewicz
> Priority: P3
> Time Spent: 4h 40m
> Remaining Estimate: 0h
>
> At this moment Custom Source in being split and serialized in sequence. If
> there are many splits, it takes time to process all splits.
>
> Example: it takes 2s to calculate size and serialize CassandraSource due to
> connection setup and teardown. With 100+ splits, it's a lot of time spent in
> 1 worker.
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