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From "Alessandro Presta (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GIRAPH-459) Group Vertex Mutations by Partition ID
Date Mon, 31 Dec 2012 01:18:12 GMT

    [ https://issues.apache.org/jira/browse/GIRAPH-459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13541210#comment-13541210
] 

Alessandro Presta commented on GIRAPH-459:
------------------------------------------

I think that's ok. The only issue I see is that edge-based input currently relies on calling
resolveMutations() at the end of input superstep, so some refactoring will be needed.
                
> Group Vertex Mutations by Partition ID
> --------------------------------------
>
>                 Key: GIRAPH-459
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-459
>             Project: Giraph
>          Issue Type: Improvement
>          Components: graph
>            Reporter: Claudio Martella
>
> Currently, vertex mutations, and implicit creations of vertices based on messages to
non-existing vertices, are executed randomly partition-wise. The iterated vertices can belong
to different partitions. This is bad when we work out-of-core, as we need to load and unload
the whole partition for each vertex. We should group these operations per-partition, and batch-execute
them.

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