[jira] Commented: (HAMA-304) Allow BSP peers to get a list of all other peers executing tasks of the same job

["Edward J. Yoon (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HAMA-304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12919692#action_12919692 ] 

Edward J. Yoon commented on HAMA-304:
-------------------------------------

>> The implementation might not be very efficient for very large clusters, as a list of groom server addresses is sent in each HeartBeat response. This is something I think it should be improved sometime later.

This patch allows a peer to get a list of all other peers. so, all peers collets and calculates the same result, after each peer executes its portion of the loop a number of times. Right?

Only one peer can do that but +1, thinking we can improve Pi algorithm later. 
Rest are looks great!

> Allow BSP peers to get a list of all other peers executing tasks of the same job
> --------------------------------------------------------------------------------
>
>                 Key: HAMA-304
>                 URL: https://issues.apache.org/jira/browse/HAMA-304
>             Project: Hama
>          Issue Type: New Feature
>            Reporter: Filipe Manana
>            Assignee: Filipe Manana
>         Attachments: hama-304.patch
>
>
> Hi,
> Currently (as in the PiEstimator example), when a peer wants to send a message to other peer, it has to know in advance its hostname and port. This is likely fine for very small clusters, but not convenient for reasonably sized clusters.
> The following patch allows a peer to get a list of all other peers (collection of InetSocketAddress) so that it doesn't force a BSP job to know in advance the hostname and ports of the peers.
> The implementation might not be very efficient for very large clusters, as a list of groom server addresses is sent in each HeartBeat response. This is something I think it should be improved sometime later.
> Feedback welcome.
> cheers

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