def randomizeProperty(self, nodeName, propertyName, associatedData=None):
"""
Randomizes a property for a given node, returning its new value
"""
# the following machines will have poor health
if nodeName in self.badMachines:
if propertyName == "health":
return normalizeValue(self.nodeState[nodeName][propertyName] + self.badNodeHealthDelta[associatedData['severity']])
elif propertyName == "memoryUsage":
return normalizeValue(self.nodeState[nodeName][propertyName] + getRandomElement(self.badNodeMemoryDelta))
if propertyName == "memoryUsage":
return normalizeValue(self.nodeState[nodeName][propertyName] + numpy.random.normal(loc=-0.025, scale=0.05))
return RandomSimulator.randomizeProperty(self, nodeName, propertyName, associatedData)
def randomizeProperty(self, nodeName, propertyName, associatedData=None):
"""
Randomizes a property for a given node, returning its new value
"""
# rack1 will have low CPU & memory utilization
if propertyName == "cpuUsage" and "machine1" in nodeName:
return normalizeValue(self.nodeState[nodeName][propertyName] + getRandomElement(self.lowCpuUsageDelta))
# rack3 will have high CPU utilization
elif propertyName == "cpuUsage" and "machine3" in nodeName:
return normalizeValue(self.nodeState[nodeName][propertyName] + getRandomElement(self.highCpuUsageDelta))
if propertyName == "contextSwitchRate":
return normalizeValue(self.nodeState[nodeName]["cpuUsage"] + numpy.random.normal(loc=0, scale=0.10))
else:
return RandomSimulator.randomizeProperty(self, nodeName, propertyName, associatedData)
