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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