[jira] [Created] (FLINK-1758) Extend Gelly's neighborhood methods

[Shang Yuanchun (Jira)]

Vasia Kalavri created FLINK-1758:
------------------------------------

             Summary: Extend Gelly's neighborhood methods
                 Key: FLINK-1758
                 URL: https://issues.apache.org/jira/browse/FLINK-1758
             Project: Flink
          Issue Type: Improvement
          Components: Gelly
    Affects Versions: 0.9
            Reporter: Vasia Kalavri


Currently, the neighborhood methods only allow returning a single value per vertex. In many case, it is desirable to return several or no value per vertex. This is the case in clustering coefficient computation, vertex-centric jaccard, algorithms where a vertex computes a value per edge or when a vertex computes a value only for some of its neighbors.

This issue proposes to
- change the current reduceOnEdges/reduceOnNeighbors methods to use combinable reduce operations where possible
- provide groupReduce-versions, which will use a Collector and allow returning none or more values per vertex.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)