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https://issues.apache.org/jira/browse/HADOOP-10610?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14000043#comment-14000043
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Ted Malaska commented on HADOOP-10610:
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Sorry I have been slow on this. I will have the new patch sometime this
weekend.
Thanks again for the help.
> Upgrade S3n s3.fs.buffer.dir to suppoer multi directories
> ---------------------------------------------------------
>
> Key: HADOOP-10610
> URL: https://issues.apache.org/jira/browse/HADOOP-10610
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs/s3
> Affects Versions: 2.4.0
> Reporter: Ted Malaska
> Assignee: Ted Malaska
> Priority: Minor
> Attachments: HDFS-6383.patch
>
>
> s3.fs.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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