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Posted to dev@mahout.apache.org by "Andrew Palumbo (JIRA)" <ji...@apache.org> on 2015/03/06 03:28:39 UTC

[jira] [Commented] (MAHOUT-1628) Propagation of Updates in DF

    [ https://issues.apache.org/jira/browse/MAHOUT-1628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14349826#comment-14349826 ] 

Andrew Palumbo commented on MAHOUT-1628:
----------------------------------------

"Data Frames" being DRMs I am assuming.

> Propagation of Updates in DF
> ----------------------------
>
>                 Key: MAHOUT-1628
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1628
>             Project: Mahout
>          Issue Type: New Feature
>            Reporter: Suminda Dharmasena
>              Labels: DSL, scala
>
> Given data frame :
> C = A + B
> If some cells in A or B are updated:
> 1) calculate C using the latest values in A and B when C is accessed (pull)
> 2) when A or B is updated then propagate changes to C (push)
> You can use different operator for = in the above cases  



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