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

["Suminda Dharmasena (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAHOUT-1628?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Suminda Dharmasena updated MAHOUT-1628:
---------------------------------------
    Description: 
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  

  was:
Given data frame :

C = A + B

If some cells in A or B are updated:
1) calculate only when C is used using the latest values in A and B
2) when A or B is updated then propagate changes to C

You can use different operator for = in the above cases  


> 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
>
> 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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