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From "Samuel Guo (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HAMA-107) Blocking job should be a map/reduce job
Date Tue, 18 Nov 2008 14:57:44 GMT

    [ https://issues.apache.org/jira/browse/HAMA-107?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12648617#action_12648617
] 

Samuel Guo commented on HAMA-107:
---------------------------------

My idea:

During the map phrase,
we will map <row-id, row-vector> to <blockid1, <row-id, row-vector-blockslice1>
>, <blockid2, <row-id, row-vector-blockslice2> >, ... , <blockidn, <row-id,
row-vector-blockslicen> >.

During the reduce phrase,
we can collect <blockidm, list<<row-id,row-vector-blockslicem> >, then sort
the list to get the right sub matrix, and store them.

Any comments?

> Blocking job should be a map/reduce job
> ---------------------------------------
>
>                 Key: HAMA-107
>                 URL: https://issues.apache.org/jira/browse/HAMA-107
>             Project: Hama
>          Issue Type: Improvement
>          Components: implementation
>            Reporter: Edward J. Yoon
>             Fix For: 0.1.0
>
>
> DenseMatrix.blocking() used for build a blocked dense matrix. But, it should be work
on map/reduce to improve speed.

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