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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-930) Add support for reading regular (non-block-based) files from S3 in S3FileSystem
Date Thu, 08 May 2008 22:52:55 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-930?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12595415#action_12595415
] 

Hadoop QA commented on HADOOP-930:
----------------------------------

+1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12381659/hadoop-930-v3.patch
  against trunk revision 654315.

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 159 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    +1 core tests.  The patch passed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2428/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2428/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2428/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2428/console

This message is automatically generated.

> Add support for reading regular (non-block-based) files from S3 in S3FileSystem
> -------------------------------------------------------------------------------
>
>                 Key: HADOOP-930
>                 URL: https://issues.apache.org/jira/browse/HADOOP-930
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: fs
>    Affects Versions: 0.10.1
>            Reporter: Tom White
>            Assignee: Tom White
>             Fix For: 0.18.0
>
>         Attachments: hadoop-930-v2.patch, hadoop-930-v3.patch, hadoop-930.patch, jets3t-0.6.0.jar
>
>
> People often have input data on S3 that they want to use for a Map Reduce job and the
current S3FileSystem implementation cannot read it since it assumes a block-based format.
> We would add the following metadata to files written by S3FileSystem: an indication that
it is block oriented ("S3FileSystem.type=block") and a filesystem version number ("S3FileSystem.version=1.0").
Regular S3 files would not have the type metadata so S3FileSystem would not try to interpret
them as inodes.
> An extension to write regular files to S3 would not be covered by this change - we could
do this as a separate piece of work (we still need to decide whether to introduce another
scheme - e.g. rename block-based S3 to "s3fs" and call regular S3 "s3" - or whether to just
use a configuration property to control block-based vs. regular writes).

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