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#!/usr/bin/env python
#
# Author: Mike McKerns (mmckerns @caltech and @uqfoundation)
# Copyright (c) 1997-2016 California Institute of Technology.
# Copyright (c) 2016-2025 The Uncertainty Quantification Foundation.
# License: 3-clause BSD. The full license text is available at:
# - https://github.com/uqfoundation/pyina/blob/master/LICENSE
from pyina.launchers import Scatter as MpiScatter
def host(id):
import socket
return "Rank: %d -- %s" % (id, socket.gethostname())
print("Evaluate 10 items on 1 node (w/ 1 ppn) using scatter-gather:")
scat = MpiScatter('1:ppn=1')
res1 = scat.map(host, range(10))
print(scat)
print('\n'.join(res1))
print('')
print("Evaluate 10 items on 1 node (w/ 2 ppn) using scatter-gather:")
scat.nodes = '1:ppn=2'
res2 = scat.map(host, range(10))
print(scat)
print('\n'.join(res2))
print('')
# end of file
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