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https://issues.apache.org/jira/browse/ARROW-6469?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paulo Roberto Cerioni updated ARROW-6469:
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Description:
Due to PyArrow using libhdfs underneath, it is expected that files read from
HDFS are going to make use of short circuit readings.
However, the PyArrow documentation does not explain whether this feature is
supported (and on what situations) and if that works without any configuration.
For instance, I'm interested in the use case in which we make use of short
circuit feature to read some of the columns from a Parquet file located in HDFS
into a dataframe.
was:
Due to PyArrow using libhdfs underneath, it is expected that files reading from
HDFS are going to make use of short circuit readings.
However, the PyArrow documentation does not explain whether this feature is
supported (and on what situations) and if that works without any configuration.
For instance, I'm interested in the use case in which we make use of short
circuit feature to read some of the columns from a Parquet file located in HDFS
into a dataframe.
> PyArrow HDFS documentation does not mention HDFS short circuit readings
> -----------------------------------------------------------------------
>
> Key: ARROW-6469
> URL: https://issues.apache.org/jira/browse/ARROW-6469
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Reporter: Paulo Roberto Cerioni
> Priority: Minor
> Labels: documentation
>
> Due to PyArrow using libhdfs underneath, it is expected that files read from
> HDFS are going to make use of short circuit readings.
> However, the PyArrow documentation does not explain whether this feature is
> supported (and on what situations) and if that works without any
> configuration.
> For instance, I'm interested in the use case in which we make use of short
> circuit feature to read some of the columns from a Parquet file located in
> HDFS into a dataframe.
>
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