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Posted to user@spark.apache.org by Cheuk Lam <ch...@hotmail.com> on 2014/09/25 15:52:46 UTC
Pregel messages serialized in local machine?
This is a question on using the Pregel function in GraphX. Does a message
get serialized and then de-serialized in the scenario where both the source
and the destination vertices are in the same compute node/machine?
Thank you!
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Re: Pregel messages serialized in local machine?
Posted by Ankur Dave <an...@gmail.com>.
At 2014-09-25 06:52:46 -0700, Cheuk Lam <ch...@hotmail.com> wrote:
> This is a question on using the Pregel function in GraphX. Does a message
> get serialized and then de-serialized in the scenario where both the source
> and the destination vertices are in the same compute node/machine?
Yes, message passing currently uses partitionBy, which shuffles all messages, including ones to the same machine, by serializing them and writing them to disk.
Ankur
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