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From "Hyunsik Choi (JIRA)" <>
Subject [jira] [Commented] (GIRAPH-12) Investigate communication improvements
Date Wed, 07 Sep 2011 02:27:09 GMT


Hyunsik Choi commented on GIRAPH-12:

Thank you for recommendation :)

Thank you for informing me.

I post my progress of this issue.

Recently, I have implemented and tested a lightweight RPC implementation based on netty and
protocol-buffer, which resembles to YarnRPC. Apparently, an alternative RPC can give a performance

finagle is very mature in compared to my own. It would be better solution. I'll test my own
and finagle together. As soon as completed tests, I'll post the results.

> Investigate communication improvements
> --------------------------------------
>                 Key: GIRAPH-12
>                 URL:
>             Project: Giraph
>          Issue Type: Improvement
>            Reporter: Avery Ching
>            Assignee: Hyunsik Choi
>            Priority: Minor
> Currently every worker will start up a thread to communicate with every other workers.
 Hadoop RPC is used for communication.  For instance if there are 400 workers, each worker
will create 400 threads.  This ends up using a lot of memory, even with the option  
> It would be good to investigate using frameworks like Netty or custom roll our own to
improve this situation.  By moving away from Hadoop RPC, we would also make compatibility
of different Hadoop versions easier.

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