westonpace commented on pull request #9474:
URL: https://github.com/apache/arrow/pull/9474#issuecomment-777772187


   > I've added an owned IOContext to the base FileSystem class. Should we do 
that on RandomAccessFile or InputStream as well?
   
   My gut says no but I could be convinced otherwise.  For example, the S3 
filesystem (if I understand correctly) would plug the executor into the AWS 
client configuration and the random access files / etc. would rely on that and 
not the Executor directly.   At best it would just be for convenience right?  A 
way to provide implementors easy access to the context instead of having to 
take care of passing it around?
   


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