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From "Saumitra Shahapure (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-2714) Port the Flink DataSet Triangle Count example to the Gelly library
Date Thu, 08 Oct 2015 22:07:26 GMT

    [ https://issues.apache.org/jira/browse/FLINK-2714?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14949480#comment-14949480

Saumitra Shahapure commented on FLINK-2714:

I have a question. In EnumTrianglesOpt.java (https://github.com/apache/flink/blob/master/flink-examples/flink-java-examples/src/main/java/org/apache/flink/examples/java/graph/EnumTrianglesOpt.java)
line number 194, why is the vertex ordering being compared? Where is it significant?
Also, as I understand, I am supposed to replace Datatypes from EnumTrianglesDataTypes (Like
Edge) to Gelly's native datatypes (which I am already doing). In Gelly's Edge class, vertex
datatype is not comparable. So vertex1<vertex2 comparison is not possible.

> Port the Flink DataSet Triangle Count example to the Gelly library
> ------------------------------------------------------------------
>                 Key: FLINK-2714
>                 URL: https://issues.apache.org/jira/browse/FLINK-2714
>             Project: Flink
>          Issue Type: Task
>          Components: Gelly
>    Affects Versions: 0.10
>         Environment: 
>            Reporter: Andra Lungu
>            Assignee: Saumitra Shahapure
>            Priority: Trivial
>              Labels: newbie, starter
> Currently, the Gelly library contains two methods for counting the number of triangles
in a graph: a vertex-centric version and a gather-apply-scatter version. 
> This issue proposes the addition of a third library method based on this Flink example:
> https://github.com/apache/flink/blob/master/flink-examples/flink-java-examples/src/main/java/org/apache/flink/examples/java/graph/EnumTrianglesOpt.java
> The only modification needed is an extra reduce step that takes the enumerated triangles
produced and yields a number. 

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