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Posted to common-issues@hadoop.apache.org by "Steve Loughran (Jira)" <ji...@apache.org> on 2022/11/02 16:23:00 UTC

[jira] [Created] (HADOOP-18517) ABFS: Add fs.azure.enable.readahead option to disable readahead

Steve Loughran created HADOOP-18517:
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             Summary: ABFS: Add fs.azure.enable.readahead option to disable readahead
                 Key: HADOOP-18517
                 URL: https://issues.apache.org/jira/browse/HADOOP-18517
             Project: Hadoop Common
          Issue Type: Improvement
          Components: fs/azure
    Affects Versions: 3.3.4
            Reporter: Steve Loughran
            Assignee: Steve Loughran



Add an option fs.azure.enable.readahead to allow the abfs readahead to be disabled.

This has been shipping in cloudera releases, because workloads with heavy random IO don't always benefit from prefetching.

Pulling this in to ASF hadoop allows for
* everyone to experiment with/without prefetching
* ability to disable prefetching if you have problems with it





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