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From "Thomas Jungblut (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HAMA-503) Chainable computations for tault tolerance
Date Tue, 07 Feb 2012 19:53:00 GMT

    [ https://issues.apache.org/jira/browse/HAMA-503?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13202699#comment-13202699
] 

Thomas Jungblut commented on HAMA-503:
--------------------------------------

Just translated PiEstimation example to the new prototype API.

https://github.com/thomasjungblut/thomasjungblut-common/blob/master/src/de/jungblut/bsp/ft/PiEstimator.java

It's a bit more code. But hey, it is fault tolerant.
I think it is quite intuitive as well. It reminds me of writing Mappers and Reducers in Hadoop.
                
> Chainable computations for tault tolerance
> ------------------------------------------
>
>                 Key: HAMA-503
>                 URL: https://issues.apache.org/jira/browse/HAMA-503
>             Project: Hama
>          Issue Type: Sub-task
>          Components: bsp
>    Affects Versions: 0.4.0
>            Reporter: Thomas Jungblut
>             Fix For: 0.5.0
>
>
> refactor bsp() in allowing checkpointed messages to be recovered. 
> ChiaHung Lin had a fancy idea in chaining superstep class to make the whole recovering
more convenient and less error prone, or at least possible.
> A user does not define a BSP anymore, instead he defines a single superstep inside of
a computation class. A user is able to chain these in a specific ordering. After each of this
computation the framework calls sync() and exchanges the messages.

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