81 lines
2.9 KiB
Python
81 lines
2.9 KiB
Python
# -*- Mode:python; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
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#
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# Copyright (C) 2015-2018, The University of Memphis,
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# Arizona Board of Regents,
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# Regents of the University of California.
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#
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# This file is part of Mini-NDN.
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# See AUTHORS.md for a complete list of Mini-NDN authors and contributors.
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#
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# Mini-NDN is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Mini-NDN is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Mini-NDN, e.g., in COPYING.md file.
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# If not, see <http://www.gnu.org/licenses/>.
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from ndn.experiments.experiment import Experiment
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from ndn.apps.ndn_ping_client import NDNPingClient
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import time
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class MultipleFailureExperiment(Experiment):
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def __init__(self, args):
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self.PING_COLLECTION_TIME_BEFORE_FAILURE = 60
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self.FAILURE_INTERVAL = 60
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self.RECOVERY_INTERVAL = 60
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# This is the number of pings required to make it through the full experiment
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nInitialPings = (self.PING_COLLECTION_TIME_BEFORE_FAILURE +
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len(args["net"].hosts) * (self.FAILURE_INTERVAL + self.RECOVERY_INTERVAL))
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print("Scheduling with {} initial pings".format(nInitialPings))
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Experiment.__init__(self, args)
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self.options.nPings = nInitialPings
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def run(self):
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self.startPctPings()
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# After the pings are scheduled, collect pings for 1 minute
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time.sleep(self.PING_COLLECTION_TIME_BEFORE_FAILURE)
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nNodesRemainingToFail = len(self.net.hosts)
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# Fail and recover each node
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for host in self.net.hosts:
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# Fail the node
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self.failNode(host)
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# Stay in failure state for FAILURE_INTERVAL seconds
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time.sleep(self.FAILURE_INTERVAL)
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# Bring the node back up
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start_time = time.time()
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self.recoverNode(host)
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recovery_time = int(time.time() - start_time)
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# Number of pings required to reach the end of the test
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nNodesRemainingToFail -= 1
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nPings = ((self.RECOVERY_INTERVAL - recovery_time) +
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nNodesRemainingToFail*(self.FAILURE_INTERVAL + self.RECOVERY_INTERVAL))
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print("Scheduling with {} remaining pings".format(nPings))
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# Restart pings
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for nodeToPing in self.pingedDict[host]:
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NDNPingClient.ping(host, nodeToPing, nPings)
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time.sleep(self.RECOVERY_INTERVAL - recovery_time)
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Experiment.register("multiple-failure", MultipleFailureExperiment)
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