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https://issues.apache.org/jira/browse/GIRAPH-909?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pavan Kumar resolved GIRAPH-909.
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Resolution: Duplicate
> support succinct representation of messages in messagestores
> ------------------------------------------------------------
>
> Key: GIRAPH-909
> URL: https://issues.apache.org/jira/browse/GIRAPH-909
> Project: Giraph
> Issue Type: Improvement
> Reporter: Pavan Kumar
> Assignee: Pavan Kumar
>
> Currently we use ByteArrayVertexIdMessages data-structure to store vertex id
> & its messages. Even for ByteArrayOneToAllMessages data-structure, while
> storing in message-store we always convert it to ByteArrayVertexIdMessages,
> in this case if many vertices on a worker receive the same message, it is
> stored as many times. This uses up lot of memory, so if we have message
> stores that can avoid all this duplication in storing messages, we can bring
> down memory footprint by a large amount.
> Note: however, here the pre-req is that your graph has to be partitioned such
> that a vertex sends messages to vertices only in a few other workers (not all
> of them - as happens with HashPartitioning)
> This change depends heavily on GIRAPH-907 & GIRAPH-908
> I already have patch for it, need to tidy up few things, will put it up by
> end of this week.
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