Allow BSP peers to get a list of all other peers executing tasks of the same job
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Key: HAMA-304
URL: https://issues.apache.org/jira/browse/HAMA-304
Project: Hama
Issue Type: Bug
Reporter: Filipe Manana
Assignee: Filipe Manana
Hi,
Currently (as in the PiEstimator example), when a peer wants to send a message
to other peer, it has to know in advance its hostname and port. This is likely
fine for very small clusters, but not convenient for reasonably sized clusters.
The following patch allows a peer to get a list of all other peers (collection
of InetSocketAddress) so that it doesn't force a BSP job to know in advance the
hostname and ports of the peers.
The implementation might not be very efficient for very large clusters, as a
list of groom server addresses is sent in each HeartBeat response. This is
something I think it should be improved sometime later.
Feedback welcome.
cheers
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