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https://issues.apache.org/jira/browse/HAMA-745?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13660591#comment-13660591
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Edward J. Yoon commented on HAMA-745:
-------------------------------------

My idea for reducing memory usage, was use of sorted vertices and sequential 
(or serial) processing[1]: 

{code}
Edward J. Yoon added a comment - 30/Jan/13 07:25
I'm thinking about external merge sort 
http://en.wikipedia.org/wiki/External_sorting
Edward J. Yoon added a comment - 04/Feb/13 06:28
Once HAMA-723 is done, we can sort messages by vertex ID. Then, we can read 
messages of vertex and perform vertex.compute() sequentially.
{code}

And, Thomas Jungblut implemented serial processing and DiskVerticesInfo but, 
the problem was that PartitioningRunner creates unsorted partitions.

Do you work on this issue?

1. 
https://issues.apache.org/jira/browse/HAMA-704?focusedCommentId=13566257&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13566257

                
> ListVerticesInfo doesn't work
> -----------------------------
>
>                 Key: HAMA-745
>                 URL: https://issues.apache.org/jira/browse/HAMA-745
>             Project: Hama
>          Issue Type: Bug
>            Reporter: Edward J. Yoon
>            Assignee: Edward J. Yoon
>             Fix For: 0.6.1
>
>         Attachments: HAMA-745.patch, HAMA-745_v02.patch
>
>
> Just tried to use ListVerticesInfo instead of DiskVerticesInfo but doesn't 
> work correctly. The reason is that addVertex() changes the same object. It 
> need to reinitializing vertex object.

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