[HADOOP-18186] s3a prefetching to use SemaphoredDelegatingExecutor for submitting work

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0, 3.3.6
• Component/s: fs/s3
• Labels: pull-request-available
• Assignee: Viraj Jasani
• Reporter: Steve Loughran
• Created: 29/Mar/22 12:49
• Updated: 08/Jun/23 20:25
• Resolved: 16/Sep/22 19:56

Description

Use SemaphoredDelegatingExecutor for each to stream to submit work, if possible, for better fairness in processes with many streams.

this also takes a DurationTrackerFactory to count how long was spent in the queue, something we would want to know

if cherrypicking, follow with HADOOP-18466 and HADOOP-18455

Issue Links

• causes: HADOOP-18455 s3a prefetching Executor should be closed
• is depended upon by: HADOOP-18703 Backport S3A prefetching stream to branch-3.3
• links to: GitHub Pull Request #4796