Chamikara Jayalath created BEAM-700:
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Summary: Update FileBasedSource to use sampling when estimating
size of file patterns
Key: BEAM-700
URL: https://issues.apache.org/jira/browse/BEAM-700
Project: Beam
Issue Type: Bug
Components: sdk-py
Reporter: Chamikara Jayalath
Assignee: Chamikara Jayalath
Fix For: Not applicable
Currently when estimating size of file patterns we estimate size of each file
and add the sizes up [1]. This can be very inefficient for file patterns that
expand into a large number of files. We should update FIleBasedSource to use
sampling similar to Java SDK [2].
[1]https://github.com/apache/incubator-beam/blob/python-sdk/sdks/python/apache_beam/io/filebasedsource.py#L120
[2]
https://github.com/apache/incubator-beam/blob/python-sdk/sdks/java/core/src/main/java/org/apache/beam/sdk/io/FileBasedSource.java#L204
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