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From "Jake Mannix (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GIRAPH-28) Introduce new primitive-specific MutableVertex subclasses
Date Wed, 14 Sep 2011 23:44:09 GMT

    [ https://issues.apache.org/jira/browse/GIRAPH-28?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13105004#comment-13105004
] 

Jake Mannix commented on GIRAPH-28:
-----------------------------------

Ok another patch coming soon for this, but good news:  this is the output of the object size
calculator now:
(key: Primitive is what Dmitriy put in that test code, LDFD is a trivial class which extends
the new LongDoubleFloatDoubleVertex class, and shows exactly the same memory as this)

Tiny:   	0	840
Object:   	0	872
Primitive:	0	4536
LDFD:   	0	4536
Tiny:   	1	840
Object:   	1	976
Primitive:	1	4536
LDFD:   	1	4536
Tiny:   	10	840
Object:   	10	1912
Primitive:	10	4536
LDFD:   	10	4536
Tiny:   	100	2640
Object:   	100	11272
Primitive:	100	4536
LDFD:   	100	4536
Tiny:   	1000	16080
Object:   	1000	104872
Primitive:	1000	46784
LDFD:   	1000	46784
Tiny:   	10000	123600
Object:   	10000	1040872
Primitive:	10000	302000
LDFD:   	10000	302000

> Introduce new primitive-specific MutableVertex subclasses
> ---------------------------------------------------------
>
>                 Key: GIRAPH-28
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-28
>             Project: Giraph
>          Issue Type: New Feature
>          Components: graph
>    Affects Versions: 0.70.0
>            Reporter: Jake Mannix
>            Assignee: Jake Mannix
>         Attachments: GIRAPH-28.diff, GIRAPH-28.diff
>
>
> As discussed on the list, MutableVertex<LongWritable,DoubleWritable,FloatWritable,DoubleWritable>
(for example) could be highly optimized in its memory footprint if the vertex and edge data
were held in a form which minimized Java object usage.

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