[GitHub] flink pull request: [docs] Add first version of "Concepts" documen...

[StephanEwen]

GitHub user StephanEwen opened a pull request:

    https://github.com/apache/flink/pull/1843

    [docs] Add first version of "Concepts" documentation.

    I think that the Flink docs (linked from the website) need a general 
introduction of the concepts behind Flink.
    
    Such a thing is important for people to get a "mental model" of what Flink 
does. Also, most of the later documentation assumes that people know about 
operators, streams, parallelism, JobManagers, TaskManagers, etc.
    
    This **Concepts** page introduces these things briefly and high level, so 
people get a basic understanding of the who-is-who and what-is-what in Flink.
    
    *Since these pull requests don't render the SVG files, I added them here.*
    
    
![prorgam_dataflow](https://cloud.githubusercontent.com/assets/1727146/14184836/6f41aefe-f777-11e5-8eb4-eab949d1790f.png)
    
    ------
    
    
![parallel_dataflow](https://cloud.githubusercontent.com/assets/1727146/14184846/7f663e9e-f777-11e5-9cee-930fa8a95957.png)
    
    ------
    
    
![operators_tasks_chaining](https://cloud.githubusercontent.com/assets/1727146/14184849/833a4e3e-f777-11e5-8146-25343dad233b.png)
    
    ------
    
    
![processes](https://cloud.githubusercontent.com/assets/1727146/14184861/8af17aee-f777-11e5-831d-d044002d7e1b.png)
    
    ------
    
    
![tasks_slots](https://cloud.githubusercontent.com/assets/1727146/14184863/8dd6c98a-f777-11e5-8488-b50bcbf28dea.png)
    
    ------
    
    
![slot_sharing](https://cloud.githubusercontent.com/assets/1727146/14184868/916b5746-f777-11e5-9924-48ddae65e767.png)

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/StephanEwen/incubator-flink concepts

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/flink/pull/1843.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #1843
    
----
commit 3b4f9d2859684f6537d623fc871c5d1d6a1c2fcb
Author: Stephan Ewen <se...@apache.org>
Date:   2016-03-31T17:25:35Z

    [docs] Add first version of "concepts" documentation.

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