def main_server(COMM):
nprocs = COMM.Get_size()
myrank = COMM.Get_rank()
service, port, info = None, None, MPI.INFO_NULL
if myrank == 0:
port = MPI.Open_port(info)
log(COMM, "open port '%s'", port)
service = 'cpi'
MPI.Publish_name(service, info, port)
log(COMM, "service '%s' published.", service)
else:
port = ''
log(COMM, "waiting for client connection ...")
icomm = COMM.Accept(port, info, root=0)
log(COMM, "client connection accepted.")
worker(icomm)
log(COMM, "disconnecting from client ...")
icomm.Disconnect()
log(COMM, "client disconnected.")
if myrank == 0:
MPI.Unpublish_name(service, info, port)
log(COMM, "service '%s' unpublished", port)
MPI.Close_port(port)
log(COMM, "closed port '%s' ", port)
def close():
MPI.Unpublish_name(self.service, self.info, self.port)
print '[Server] Service unpublished'
MPI.Close_port(self.port)
print '[Server] Service port closed'
def testNamePublishing(self):
rank = MPI.COMM_WORLD.Get_rank()
service = "mpi4py-%d" % rank
port = MPI.Open_port()
MPI.Publish_name(service, port)
found = MPI.Lookup_name(service)
self.assertEqual(port, found)
MPI.Unpublish_name(service, port)
MPI.Close_port(port)
info = MPI.INFO_NULL
port = MPI.Open_port(info)
print "Server port: '%s'", port
service = 'cpi'
MPI.Publish_name(service, info, port)
print 'Service %s published', service
root = 0
print 'Waiting for connection request'
comm = MPI.COMM_WORLD.Accept(port, info, root)
print 'Connected to one client'
while True:
message = comm.recv(source=0, tag=0)
if message == 'quit':
break
else:
print 'Receive one message from client:%s' % message
comm.Disconnect()
print 'Connected with one client'
MPI.Unpublish_name(service, info, port)
print 'Service unpublished'
MPI.Close_port(port)
print 'Server port closed'
Run this with 1 processes like: $ mpiexec -n 1 python server.py """ import numpy as np from mpi4py import MPI comm = MPI.COMM_WORLD service_name = 'compute' # open a port port_name = MPI.Open_port() # bind the opened port to a service_name, # client can connect to the port by looking-up this service_name MPI.Publish_name(service_name, port_name) # wait for client to connect inter_comm = comm.Accept(port_name) # receive message from client recv_obj = inter_comm.recv(source=0, tag=0) print 'Server receives %s from client.' % recv_obj send_obj = eval(recv_obj) # reply the result to the client print 'Server sends %s to client.' % send_obj inter_comm.send(send_obj, dest=0, tag=1) # unpublish the service_name, close the port and disconnect MPI.Unpublish_name(service_name, port_name) MPI.Close_port(port_name) inter_comm.Disconnect()
