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Posted to issues@flink.apache.org by "Martin Liesenberg (JIRA)" <ji...@apache.org> on 2015/11/27 06:24:10 UTC
[jira] [Assigned] (FLINK-2926) Add a Strongly Connected Components
Library Method
[ https://issues.apache.org/jira/browse/FLINK-2926?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Martin Liesenberg reassigned FLINK-2926:
----------------------------------------
Assignee: (was: Martin Liesenberg)
> Add a Strongly Connected Components Library Method
> --------------------------------------------------
>
> Key: FLINK-2926
> URL: https://issues.apache.org/jira/browse/FLINK-2926
> Project: Flink
> Issue Type: Task
> Components: Gelly
> Affects Versions: 0.10.0
> Reporter: Andra Lungu
> Priority: Minor
> Labels: requires-design-doc
>
> This algorithm operates in four main steps:
> 1). Form the transposed graph (each vertex sends its id to its out neighbors which form a transposedNeighbors set)
> 2). Trimming: every vertex which has only incoming or outgoing edges sets colorID to its own value and becomes inactive.
> 3). Forward traversal:
> Start phase: propagate id to out neighbors
> Rest phase: update the colorID with the minimum value seen until convergence
> 4). Backward traversal:
> Start: if the vertex id is equal to its color id propagate the value to transposedNeighbors
> Rest: each vertex that receives a message equal to its colorId will propagate its colorId to the transposed graph and becomes inactive.
> More info in section 3.1 of this paper: http://ilpubs.stanford.edu:8090/1077/3/p535-salihoglu.pdf
> or in section 6 of this paper: http://www.vldb.org/pvldb/vol7/p1821-yan.pdf
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