Steve Loughran created HADOOP-13531:
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Summary: S3A output streams to share a single LocalDirAllocator
for round-robin drive use
Key: HADOOP-13531
URL: https://issues.apache.org/jira/browse/HADOOP-13531
Project: Hadoop Common
Issue Type: Sub-task
Components: fs/s3
Affects Versions: 2.8.0
Reporter: Steve Loughran
Priority: Minor
{{S3AOutputStream}} uses {{LocalDirAllocator}} to choose a directory from the
comma-separated list of buffers —but it creates a new instance for every output
stream. This misses a key point of the allocator: for it to do round-robin
allocation, it needs to remember the last disk written to. If a new instance is
used for every file: no history.
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