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https://issues.apache.org/jira/browse/HAMA-732?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13576478#comment-13576478
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Tommaso Teofili commented on HAMA-732:
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maybe we can have something like custom Hama cache module so that we're not
bound to DM / off-heap caching.
There're different kind of serializers in DM (see
http://svn.apache.org/repos/asf/directmemory/trunk/serializers/) and the number
of allocated buffers is defined by configuration of CacheService by using
DirectMemory (see
http://svn.apache.org/repos/asf/directmemory/trunk/directmemory-cache/src/main/java/org/apache/directmemory/DirectMemory.java)
> Investigate the usage of Apache DirectMemory to store vertices
> --------------------------------------------------------------
>
> Key: HAMA-732
> URL: https://issues.apache.org/jira/browse/HAMA-732
> Project: Hama
> Issue Type: Improvement
> Components: graph
> Affects Versions: 0.6.0
> Reporter: Tommaso Teofili
> Assignee: Tommaso Teofili
> Priority: Minor
> Fix For: 0.7.0
>
> Attachments: HAMA-732.patch
>
>
> Since Apache DirectMemory can keep objects outside of the java heap that
> could help on improving performances.
> I created a simple extension implementation of VerticesInfo which uses Apache
> DirectMemory CacheService instead of a List, performance seem to be improved.
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