[GitHub] [beam] Abacn opened a new pull request, #24317: Reduce calls to FileSystem.match and API calls in FileSystem._list

Tue, 22 Nov 2022 15:01:16 -0800 


Abacn opened a new pull request, #24317:
URL: https://github.com/apache/beam/pull/24317

   Resolves one aspect of #20137
   
   * Reuse concat_source in FileBasedSource.estimate_size
   
   * Create list_files to replace list_prefix to conduct lazy listing files in 
GcsIO, S3IO, BlobStorageIO
   
   **Please** add a meaningful description for your change here
   
   This resolves duplicate API calls to list files for `ReadFromText` 
transform. When there are lots of files, it should make 1/2 of the API calls 
than before (and 1/3 of when validate option is set to True).
   
   Listing files is still not multi threading though, so leave this issue open.
   
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