Investigate communication improvements
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Key: GIRAPH-12
URL: https://issues.apache.org/jira/browse/GIRAPH-12
Project: Giraph
Issue Type: Improvement
Reporter: Avery Ching
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
-Dmapred.child.java.opts="-Xss64k".
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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