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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1413) A new example to do tile placements using distributed dancing links
Date Tue, 22 May 2007 18:37:16 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12497950

Owen O'Malley commented on HADOOP-1413:

I think that the malicious code rules should be disabled, because we aren't trying to enforce
code safety via security managers.

> A new example to do tile placements using distributed dancing links
> -------------------------------------------------------------------
>                 Key: HADOOP-1413
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1413
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: examples
>            Reporter: Owen O'Malley
>         Assigned To: Owen O'Malley
>             Fix For: 0.14.0
>         Attachments: dancing.patch
> During a Yahoo Hack Day last year, I wrote a distributed pentomino solver that used map/reduce
and Knuth's dancing link algorithm to solve pentomino tile placement problems. As a side benefit,
I also wrote a sudoku solver using the dancing link library, but the sudoku solver is so fast
that there is no need to distribute it. Anyways, I think it makes an interesting example of
how to do some interesting cpu-heavy distribution in Hadoop.

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