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Posted to common-issues@hadoop.apache.org by "Adrian Muraru (JIRA)" <ji...@apache.org> on 2016/08/22 05:01:20 UTC

[jira] [Created] (HADOOP-13530) Upgrade S3 fs.s3.buffer.dir to support multi directories

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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