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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (BEAM-2643) Add TextIO and AvroIO read transforms that can read a PCollection of files
Date Thu, 10 Aug 2017 20:40:00 GMT

    [ https://issues.apache.org/jira/browse/BEAM-2643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16122285#comment-16122285
] 

ASF GitHub Bot commented on BEAM-2643:
--------------------------------------

Github user asfgit closed the pull request at:

    https://github.com/apache/beam/pull/3661


> Add TextIO and AvroIO read transforms that can read a PCollection of files
> --------------------------------------------------------------------------
>
>                 Key: BEAM-2643
>                 URL: https://issues.apache.org/jira/browse/BEAM-2643
>             Project: Beam
>          Issue Type: New Feature
>          Components: sdk-py
>            Reporter: Chamikara Jayalath
>            Assignee: 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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