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From "Alessandro Presta (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GIRAPH-459) Group Vertex Mutations by Partition ID
Date Fri, 04 Jan 2013 16:46:12 GMT

    [ https://issues.apache.org/jira/browse/GIRAPH-459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13544008#comment-13544008
] 

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

+1

(1) is no big deal, I just noticed an unrelated change and thought it was a mistake. If Checkstyle
doesn't complain, you may be right.

                
> 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
>            Assignee: Claudio Martella
>         Attachments: GIRAPH-459.patch
>
>
> 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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