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https://issues.apache.org/jira/browse/ARROW-7309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16988757#comment-16988757
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Fabian Höring edited comment on ARROW-7309 at 12/5/19 12:42 PM:
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[~apitrou] [~kszucs]
I played a bit with the new Fs interface on the c++ hdfs filesystem and by
directly using this in Python (ARROW-7311)
Indeed getting it with FileSystemFromUri seems easy.
However the API completely changed in
https://github.com/apache/arrow/blob/master/python/pyarrow/_fs.pyx#L172
How are you going to map this to the existing documented interface ?
https://arrow.apache.org/docs/python/filesystems.html
There seems to be something missing.
I'm not convinced that `fs.get_target_stats(Selector("/user/f.horing/")` is
easier than the existing `fs.ls("/user/f.horing/*")`
was (Author: fhoering):
[~apitrou] [~kszucs]
I played a bit with the new Fs interface on the c++ hdfs filesystem and by
directly using this in Python (ARROW-7311)
Indeed getting it with FileSystemFromUri seems easy.
However the API completely changed in
https://github.com/apache/arrow/blob/master/python/pyarrow/_fs.pyx#L172
How are you going to map this to the existing documented interface ?
https://arrow.apache.org/docs/python/filesystems.html
There seems to be something missing.
I'm not convinced that fs.get_target_stats(Selector("/user/f.horing/*") is
easier than the existing fs.ls("/user/f.horing/*")
> [Python] Support HDFS federation viewfs://
> ------------------------------------------
>
> Key: ARROW-7309
> URL: https://issues.apache.org/jira/browse/ARROW-7309
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Python
> Affects Versions: 0.15.1
> Reporter: Fabian Höring
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> - Add viewfs support to pyarrow.filesystem.resolve_filesystem_and_path
> - libhdfs already supports injecting the scheme and will automatically
> resolve federation in
> fs = FileSystem#get(URI, conf, ugi)
> - works with Hadoop 2/3
> see:
> https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfs/hdfs.c#L770
> https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfs/hdfs.c#L637
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