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https://issues.apache.org/jira/browse/BEAM-2643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16093633#comment-16093633
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Eugene Kirpichov commented on BEAM-2643:
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See also https://github.com/apache/beam/pull/3598
> Add TextIO.read_all() to Python SDK
> -----------------------------------
>
> Key: BEAM-2643
> URL: https://issues.apache.org/jira/browse/BEAM-2643
> Project: Beam
> Issue Type: New Feature
> Components: sdk-py
> Reporter: Chamikara Jayalath
>
> Java SDK now has TextIO.read_all() API that allows reading a massive number
> of files by moving from using the BoundedSource API (which may perform
> expensive source operations on the control plane) to using ParDo operations.
> https://github.com/apache/beam/blob/master/sdks/java/core/src/main/java/org/apache/beam/sdk/io/TextIO.java#L170
> This API should be added for Python SDK as well.
> This form of reading files does not support dynamic work rebalancing for now.
> But this should not matter much when reading a massive number of relatively
> small files. In the future this API can support dynamic work rebalancing
> through Splittable DoFn.
> cc: [~jkff]
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