hama-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Suraj Menon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HAMA-704) Optimization of memory usage during message processing
Date Fri, 15 Feb 2013 13:05:14 GMT

    [ https://issues.apache.org/jira/browse/HAMA-704?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13579152#comment-13579152
] 

Suraj Menon commented on HAMA-704:
----------------------------------

Yes! Sorting would take more time, especially till messaging is synchronous. 
I am not an expert, but can we call compute before aggregation by master?

As we decided, you can check this on the new branch.

On a side note, have you profiled and checked the number of objects created in the process?
Every compare in SortedQueue involves creating new String object. Can you check if removing
 and doing VertexId.compare(otherVertexId) makes any difference. 

I would suggest that the requirements get defined here. The design should get things to work
on 16GB 400 node cluster as well as a 4GB 15 node cluster. In any scenario, if we reach the
main memory limit, we would have to spill to disk or find some other modes of persistence.

                
> 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.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message