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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2020/09/18 18:55:05 UTC

[GitHub] [hadoop] steveloughran commented on pull request #2307: HADOOP-17250 ABFS short reads can be merged with readahead.

steveloughran commented on pull request #2307:
URL: https://github.com/apache/hadoop/pull/2307#issuecomment-695032321


   BTW, #2168 is calling out for reviewers. This defines a standard option for setting seek policy, and another for file length (you can skip the HEAD check then,see). And it sets distcp and other download operations (including YARN) to always do sequential.
   
   For ABFS, that tells the stream that one big GET with as much prefetch as you can do is going to be best


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