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Date: Tue, 13 May 2014 14:33:20 +0000 (UTC)
From: "Ted Malaska (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.12713903.1399991333403.337584.1399991600068@arcas>
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Subject: [jira] [Updated] (HDFS-6383) Upgrade S3n s3.fs.buffer.dir to
 suppoer multi directories
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     [ https://issues.apache.org/jira/browse/HDFS-6383?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ted Malaska updated HDFS-6383:
------------------------------

    Status: Patch Available  (was: Open)

Patch is ready

> Upgrade S3n s3.fs.buffer.dir to suppoer multi directories
> ---------------------------------------------------------
>
>                 Key: HDFS-6383
>                 URL: https://issues.apache.org/jira/browse/HDFS-6383
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: 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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