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From "Suraj Menon (JIRA)" <j...@apache.org>
Subject [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
Date Tue, 08 May 2012 08:27:58 GMT

    [ https://issues.apache.org/jira/browse/HAMA-556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13270315#comment-13270315
] 

Suraj Menon commented on HAMA-556:
----------------------------------

I don't know from top of my mind. Completely understand the scrolling pain on empty function
definitions. I think there are lot of programmers who do not like overriding a non virtual
function. If the programmer does not have access to source code, he does not know what the
functions do and would be tentative in super() calls in the body of overriding function definition.
Not a show stopper.
                
> 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
>            Assignee: Thomas Jungblut
>            Priority: Minor
>             Fix For: 0.6.0
>
>         Attachments: HAMA-556.patch, HAMA-556_1.patch
>
>
> Currently in the graph package, the iteration continues till the nodes are no longer
updated (absolutely) or the maximum number of iterations has reached.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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