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Posted to dev@hama.apache.org by "Thomas Jungblut (JIRA)" <ji...@apache.org> on 2012/05/04 20:04:48 UTC
[jira] [Commented] (HAMA-556) Graph package to support stopping the
interations when the node changes are within the tolerance value as in the
case of page rank
[ https://issues.apache.org/jira/browse/HAMA-556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13268587#comment-13268587 ]
Thomas Jungblut commented on HAMA-556:
--------------------------------------
BTW where is the activeness of a vertex? this is totally not included currently.
The Pregel API don't include this kind of convergence, this needs supervision of the graph and can't be handled so good with it. Therefore "aggregators" should be used.
> Graph package to support stopping the interations when the node changes are within the tolerance value as in the case of page rank
> ----------------------------------------------------------------------------------------------------------------------------------
>
> Key: HAMA-556
> URL: https://issues.apache.org/jira/browse/HAMA-556
> Project: Hama
> Issue Type: New Feature
> Components: bsp core
> Affects Versions: 0.5.0
> Reporter: praveen sripati
> Priority: Minor
> Fix For: 0.6.0
>
>
> Currently in the graph package, the iteration continues till the nodes are no longer updated (absolutely) or the maximum number of iterations has reached. It doesn't support testing the node changes with some tolerance and then stop the iterations as in the case of page rank.
> The above scenario might be applicable besides page rank also.
> org.apache.hama.graph.GraphJobRunner#bsp()
> while (updated && iteration < maxIteration) {
> ......
> ......
> }
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