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Posted to common-issues@hadoop.apache.org by "Steve Loughran (JIRA)" <ji...@apache.org> on 2014/05/16 13:22:57 UTC

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

     [ https://issues.apache.org/jira/browse/HADOOP-10610?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Loughran moved HDFS-6383 to HADOOP-10610:
-----------------------------------------------

     Target Version/s: 2.5.0  (was: 2.5.0)
    Affects Version/s:     (was: 2.4.0)
                       2.4.0
                  Key: HADOOP-10610  (was: HDFS-6383)
              Project: Hadoop Common  (was: Hadoop HDFS)

> 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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