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

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-10610?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14000924#comment-14000924 ] 

Hadoop QA commented on HADOOP-10610:
------------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12645414/HADOOP-10610.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number of release audit warnings.

    {color:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-common-project/hadoop-common:

                  org.apache.hadoop.fs.s3native.TestInMemoryNativeS3FileSystemContract
                  org.apache.hadoop.fs.s3native.TestS3NInMemoryFileSystem

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/3952//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/3952//console

This message is automatically generated.

> Upgrade S3n s3.fs.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
>         Attachments: HADOOP-10610.patch, 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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