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Posted to dev@hama.apache.org by "Thomas Jungblut (JIRA)" <ji...@apache.org> on 2011/07/13 20:06:59 UTC

[jira] [Issue Comment Edited] (HAMA-409) Add Pregel-like API

    [ https://issues.apache.org/jira/browse/HAMA-409?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13064714#comment-13064714 ] 

Thomas Jungblut edited comment on HAMA-409 at 7/13/11 6:05 PM:
---------------------------------------------------------------

* Added a generic message with classcaching
* Refactored to generic messaging

And a design question: What do you think about just instantiating one message and then while iterating do the deserialization "one the fly"? This will greatly reduce GC and reflections overhead.

I add the voteForHalt() method tomorrow.

EDIT:
added a testcase for the generic messaging. As Edward mentioned, we should add a job.setMessageValueClass(X.class). Should we extend a GraphComputationJob for this? Don't want to mess up the BSPJob for that.


      was (Author: thomas.jungblut):
    * Added a generic message with classcaching
* Refactored to generic messaging

There is one design issue I have in usage is the call of super(Vertex.class) in a concrete implementation.

And a design question: What do you think about just instantiating one message and then while iterating do the deserialization "one the fly"? This will greatly reduce GC and reflections overhead.

I add the voteForHalt() method tomorrow.
  
> Add Pregel-like API
> -------------------
>
>                 Key: HAMA-409
>                 URL: https://issues.apache.org/jira/browse/HAMA-409
>             Project: Hama
>          Issue Type: New Feature
>          Components: bsp, examples
>    Affects Versions: 0.3.0
>            Reporter: Thomas Jungblut
>            Assignee: Miklos Erdelyi
>              Labels: graph
>             Fix For: 0.4.0
>
>         Attachments: HAMA-409_v01.patch, HAMA-409_v02.patch, hama-graph.zip
>
>
> According to what we've discussed on the mailing list, we should add a Pregel-like API.

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