ConnectorManager

AuthorizationCredentials

Publish RequestsSubscribe Requests

Connection Info/Peer List

PublisherCatcher m

PublisherCatcher 2

PublisherCatcher 1

IncomingPublication

From HPCs

or Client

NextAvailable

All pubs received

Broker 1

Broker 2

Broker n

Connector(Broadcast)

If pubs received

Any-to-

Any

BrokeredAssignments

BrokeredAssignments

BrokeredAssignments

Disseminator 1

Disseminator 2

Disseminator k

Deliver pubto client

Deliver pubto client

Deliver pubto client

HPC2 HPC3 HPC4

m: # of pub catchersn: # of independent “all-purpose” brokersk: # of disseminators

PSQ BrokerArchitecture

• Tests were run with 1 publishing process and 2 subscribing process each with a 1 clause predicate• The process were on the same host computer to minimize network transit• Publication rate 4785 ios/sec• End to end latency 145 microseconds with 118 microseconds attributed to the brokering leaving 27 microseconds for transport.• An MPI program was written to approximate this test and resulted in 27 microsecond latencies and rates over 20,000 ios/sec.• Note MPI has the same transport times as the P2P PSQ with only the broking time added• Tests were run without the YFILTER library.

P2P Results