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From "Vinod Kumar Vavilapalli (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HAMA-439) Reorganize modules for YARN/MR-NextGen integration
Date Sat, 01 Oct 2011 06:26:45 GMT

    [ https://issues.apache.org/jira/browse/HAMA-439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13118693#comment-13118693
] 

Vinod Kumar Vavilapalli commented on HAMA-439:
----------------------------------------------

Alright, I thought more about this, it is far too painful during the merge, experienced myself
with YARN.

Here's what we can do. We can simply create the hama-server module and make it depend on hama-core
for now. That way hama-server will automatically get all the changes to the core for the time
being.

Once hama-server is stable enough, we can revisit this modules effort. At that time, it will
simply be moves and can be done server-side with svn.

If it is okay doing this, we can reopen this ticket and start working on trunk directly. We
can look at this reorganization later.

Thoughts? 
                
> Reorganize modules for YARN/MR-NextGen integration
> --------------------------------------------------
>
>                 Key: HAMA-439
>                 URL: https://issues.apache.org/jira/browse/HAMA-439
>             Project: Hama
>          Issue Type: Sub-task
>    Affects Versions: 0.3.0
>            Reporter: Vinod Kumar Vavilapalli
>            Assignee: Thomas Jungblut
>             Fix For: 0.4.0
>
>         Attachments: HAMA-349-20110927.txt, HAMA-349-move-20110927.sh, HAMA-349-move_v2.patch,
HAMA-349-move_v2.sh, HAMA-349-move_v3.patch, HAMA-349-move_v4.patch, HAMA-349-move_v4.sh,
HAMA-349-move_v5.patch, HAMA-439.patch
>
>
> I'd like to get started on HamaV2 to work with YARN/MR-nextgen.
> Here's what I think should be the module structure:
>  - *api*: Code from HamaV1 related to APIs that will be moved to this new module. This
will mainly have the BSP APIs: _BSP_, _BSPPeerInterface_ and all the related records like
_BSPMessage_, _BSPMessageBundle etc.
>  - *core*: Current/HamaV1 server code. Will have the current _BSPMaster_/_GroomServer_
infrastructure. We should probably rename it to {{classic-server}} or something similar.
>  - *server*: New Hama server implementation to work with YARN. Will have _BSPApplicationMaster_,
_BSPTask_ and related code.
>  - *client*: Code from HamaV1 related to client that will be moved to this new module.
This will mainly have the client-submission classes/interfaces like _BSPJob_, _BSPJobClient_,
_JobStatus_ etc. It will be configurable to either run with the classic-server implementation
or with YARN.
> There will not be any package changes but only code-moves across modules, so we will
be backwards compatible.
> How does it look? Any thoughts/suggestions?

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