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From "Edward J. Yoon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HAMA-413) Remove limitation on the number of tasks
Date Tue, 23 Aug 2011 13:40:29 GMT

    [ https://issues.apache.org/jira/browse/HAMA-413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13089470#comment-13089470
] 

Edward J. Yoon commented on HAMA-413:
-------------------------------------

Now, ClusterStatus.getActiveGroomNames() method returns the names of groom servers and their
host names e.g., ["groomd_test.com_50000", "test.com"], ... It was the pair of 'groom server
name' and 'peer name' e.g., ["groomd_test.com_50000", "test.com:61000"], ....

Others are the same with before. So, changed below part only in PiEstimator.

{code}
PiEstimator:

    // Choose one as a master
    for (String hostName : cluster.getActiveGroomNames().values()) {
      conf.set(MASTER_TASK, hostName + ":" + Constants.DEFAULT_PEER_PORT);
      break;
    }
{code}

> Remove limitation on the number of tasks
> ----------------------------------------
>
>                 Key: HAMA-413
>                 URL: https://issues.apache.org/jira/browse/HAMA-413
>             Project: Hama
>          Issue Type: Sub-task
>          Components: bsp
>    Affects Versions: 0.3.0
>            Reporter: Edward J. Yoon
>            Assignee: Edward J. Yoon
>             Fix For: 0.4.0
>
>         Attachments: HAMA-413_v01.patch, HAMA-413_v02.patch, HAMA-413_v03.patch
>
>
> By HAMA-410 patch, BSPPeer object will be constructed at child process. Now we can just
remove limitation on the number of tasks.
> Here's TODO list:
> 1. The number of tasks per groom should be configurable e.g., 'bsp.local.tasks.maximum'.
> 2. The 'totalTaskCapacity' should be calculated at BSPMaster.getClusterStatus().
> 3. When scheduling tasks, consider how to allocate them.
> 4. Each BSPPeer should know all created peers of Hama cluster by job. It can be listed
based on actions of GroomServer.
> 5. In examples, 'cluster.getGroomServers()' can be changed to 'cluster.getMaxTasks()'.

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