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https://issues.apache.org/jira/browse/ARROW-17306?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Pitrou resolved ARROW-17306.
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Fix Version/s: 10.0.0
Resolution: Fixed
Issue resolved by pull request 13796
[https://github.com/apache/arrow/pull/13796]
> [C++] Provide an optimized`GetFileInfoGenerator` specialization for
> `LocalFileSystem`
> -------------------------------------------------------------------------------------
>
> Key: ARROW-17306
> URL: https://issues.apache.org/jira/browse/ARROW-17306
> Project: Apache Arrow
> Issue Type: Sub-task
> Components: C++
> Reporter: Pavel Solodovnikov
> Assignee: Pavel Solodovnikov
> Priority: Major
> Labels: pull-request-available
> Fix For: 10.0.0
>
> Time Spent: 10h 50m
> Remaining Estimate: 0h
>
> At the moment, `LocalFileSystem` does not have a separate optimized
> implementation of `GetFileInfoGenerator` with a fallback to the generic
> `FileSystem::GetFileInfoGenerator`, which simply queues the synchronous
> version of `GetFileInfo(FileSelector)` to the background thread and waits for
> its completion before yielding.
> This generally defeats all the purpose of `GetFileInfoGenerator` so that we
> cannot really use it to push down the `FileInfo` items to whatever consumer
> "on the fly" (e.g. `FileSystemDatasetFactory` and `FileSystemDataset`,
> correspondingly).
> Provide a fair implementation so that it yields more than one time and allows
> to retrieve the data in chunks, so that the resulting `FileInfoGenerator` is
> usable for the purpose of streaming processing of data.
>
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