[jira] [Commented] (HADOOP-10610) Upgrade S3n fs.s3.buffer.dir to support multi directories

["Jason Archip (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-10610?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15058387#comment-15058387 ] 

Jason Archip commented on HADOOP-10610:
---------------------------------------

Could you please update the documentation at https://hadoop.apache.org/docs/stable/hadoop-aws/tools/hadoop-aws/index.html to include the options for fs.s3.buffer.dir

Please let me know if there is a different place to put my request 

Thanks,
Jason Archip


> Upgrade S3n fs.s3.buffer.dir to support 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
>             Fix For: 2.6.0
>
>         Attachments: HADOOP-10610.patch, HADOOP_10610-2.patch, HDFS-6383.patch
>
>
> 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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