Adrian Muraru created HADOOP-13530:
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Summary: Upgrade S3 fs.s3.buffer.dir to support multi directories
Key: HADOOP-13530
URL: https://issues.apache.org/jira/browse/HADOOP-13530
Project: Hadoop Common
Issue Type: Improvement
Components: fs/s3
Affects Versions: 2.4.0
Reporter: Adrian Muraru
Assignee: Ted Malaska
Priority: Minor
Fix For: 2.6.0
fs.s3.buffer.dir defines the tmp folder where files will be written to before
getting sent to S3. Right now this is limited to a single folder which causes
to major issues.
1. You need a drive with enough space to store all the tmp files at once
2. You are limited to the IO speeds of a single drive
This solution will resolve both and has been tested to increase the S3 write
speed by 2.5x with 10 mappers on hs1.
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