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From "Fabian Hueske (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-838) GSoC Summer Project: Implement full Hadoop Compatibility Layer for Stratosphere
Date Wed, 06 Aug 2014 08:57:12 GMT

    [ https://issues.apache.org/jira/browse/FLINK-838?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14087437#comment-14087437
] 

Fabian Hueske commented on FLINK-838:
-------------------------------------

I'm not really an expert for classloaders. I would suggest to put this issue aside for now.
Maybe someone has  a clever idea.

The more important issue is to get the job configuration right. 

Regarding the custom Partitioner/Sorter/Grouper it is not as easy as it sounded in my previous
comment. I will try to get a prototype of a custom runtime operator for Hadoop Reduce which
uses the custom sorter and grouper instead of the Flink provided sorters and gropers. This
requires changes through the full job preparation process, i.e., job building, optimization,
translation, and execution. Let's see if that works...

What do you mean exactly by "support for sorting (custom {Comparators})"? Are you talking
about the custom comparators for the Reduce sorter? How did you do that?

Yeah, time flies by. Only 1.5 weeks left by now. Let's try hard to get your code into the
master branch next week!


> GSoC Summer Project: Implement full Hadoop Compatibility Layer for Stratosphere
> -------------------------------------------------------------------------------
>
>                 Key: FLINK-838
>                 URL: https://issues.apache.org/jira/browse/FLINK-838
>             Project: Flink
>          Issue Type: Improvement
>            Reporter: GitHub Import
>              Labels: github-import
>             Fix For: pre-apache
>
>
> This is a meta issue for tracking @atsikiridis progress with implementing a full Hadoop
Compatibliltiy Layer for Stratosphere.
> Some documentation can be found in the Wiki: https://github.com/stratosphere/stratosphere/wiki/%5BGSoC-14%5D-A-Hadoop-abstraction-layer-for-Stratosphere-(Project-Map-and-Notes)
> As well as the project proposal: https://github.com/stratosphere/stratosphere/wiki/GSoC-2014-Project-Proposal-Draft-by-Artem-Tsikiridis
> Most importantly, there is the following **schedule**:
> *19 May - 27 June (Midterm)*
> 1) Work on the Hadoop tasks, their Context and the mapping of Hadoop's Configuration
to the one of Stratosphere. By successfully bridging the Hadoop tasks with Stratosphere, we
already cover the most basic Hadoop Jobs. This can be determined by running some popular Hadoop
examples on Stratosphere (e.g. WordCount, k-means, join) (4 - 5 weeks)
> 2) Understand how the running of these jobs works (e.g. command line interface) for the
wrapper. Implement how will the user run them. (1 - 2 weeks).
> *27 June - 11 August*
> 1) Continue wrapping more "advanced" Hadoop Interfaces (Comparators, Partitioners, Distributed
Cache etc.) There are quite a few interfaces and it will be a challenge to support all of
them. (5 full weeks)
> 2) Profiling of the application and optimizations (if applicable)
> *11 August - 18 August*
> Write documentation on code, write a README with care and add more unit-tests. (1 week)
> ---------------- Imported from GitHub ----------------
> Url: https://github.com/stratosphere/stratosphere/issues/838
> Created by: [rmetzger|https://github.com/rmetzger]
> Labels: core, enhancement, parent-for-major-feature, 
> Milestone: Release 0.7 (unplanned)
> Created at: Tue May 20 10:11:34 CEST 2014
> State: open



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