[jira] [Created] (ARROW-9227) [Python][Dataset] Write a custom field to _metadata caching file size

[Ben Kietzman (Jira)]

Ben Kietzman created ARROW-9227:
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             Summary: [Python][Dataset] Write a custom field to _metadata 
caching file size
                 Key: ARROW-9227
                 URL: https://issues.apache.org/jira/browse/ARROW-9227
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Python
    Affects Versions: 0.17.1
            Reporter: Ben Kietzman
             Fix For: 2.0.0


https://github.com/apache/arrow/pull/7547#discussion_r445663612

This will save unecessary HEAD requests when using S3



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