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From "Edward J. Yoon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HAMA-704) Optimization of memory usage during message processing
Date Mon, 18 Feb 2013 06:05:15 GMT

    [ https://issues.apache.org/jira/browse/HAMA-704?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13580438#comment-13580438
] 

Edward J. Yoon commented on HAMA-704:
-------------------------------------

{quote}The design should get things to work on 16GB 400 node cluster as well as a 4GB 15 node
cluster.{quote}

Suraj, I don't want to consider such extreme scenarios at the moment.

{quote}
Suraj: so I wanted to have a brief discussion about the whole matter 
there is no escape .. we have to think about persisting the vertices outiside main memory
4:51 PM 
Suraj: that is why Thomas was thinking of making things Disk based.
{quote}

As I told you before, each Task loads 256MB vertices and uses 30GB memory. I don't know why
you think "disk-based vertices" is helpful? Memory usage is continuously increased by vertex.setValue()?

                
> Optimization of memory usage during message processing
> ------------------------------------------------------
>
>                 Key: HAMA-704
>                 URL: https://issues.apache.org/jira/browse/HAMA-704
>             Project: Hama
>          Issue Type: Improvement
>          Components: graph
>            Reporter: Edward J. Yoon
>            Assignee: Edward J. Yoon
>            Priority: Critical
>             Fix For: 0.6.1
>
>         Attachments: hama-704_v05.patch, localdisk.patch, mytest.patch, patch.txt, patch.txt,
removeMsgMap.patch
>
>
> <vertex, message> map seems consume a lot of memory. We should figure out an efficient
way to reduce memory.

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