# cpu usage api is not fast. be patient!
# here we consistently get the cpu usage of all the web-workers and calculate the average
R_ = settings.target_response_time
start_time = datetime.datetime.now()
time_limit = datetime.timedelta(seconds=4300)
print("let's get started")
with open("dataop-pi_data-gathering_%s.csv" %(start_time.strftime("%Y-%m-%d_%H-%M-%S")), "w") as f:
while True:
now_time = datetime.datetime.now()
if now_time - start_time >= time_limit:
break
Uw_cpu = getMetrics.calculate_cpu_utilization(nodes, services["web-worker"])
Xw = getMetrics.calculate_data_incoming_rate(nodes, services["web-worker"])
data = [now_time.strftime("%Y-%m-%d %H:%M:%S"), str(Uw_cpu), str(Xw)]
hehe = ",".join(data)
print(hehe)
f.write(hehe + "\n")
'''Um_cpu = getMetrics.calculate_cpu_utilization(nodes, services["mysql"])
Xm = getMetrics.calculate_data_incoming_rate(nodes, services["mysql"])
data = [now_time.strftime("%Y-%m-%d %H:%M:%S"), str(Um_cpu), str(Xm)]
hehe = ",".join(data)
print(hehe)
f.write(hehe + "\n")'''
time.sleep(5)
# get the tasks running on our swarm cluster
for service_name, service in services.items():
settings.get_tasks(service)
# cpu usage api is not fast. be patient!
# here we consistently get the cpu usage of all the web-workers and calculate the average
R_ = settings.target_response_time
while True:
print("======================mysql server: ==========================")
CtnNum = settings.get_tasks(services["mysql"])
print("Originally, this tier has %d containers" % (CtnNum))
Uw_cpu = getMetrics.calculate_cpu_utilization(nodes, services["mysql"])
print("CPU Usage (avg): {0:.2f}%".format(Uw_cpu * 100))
Xw = getMetrics.calculate_data_incoming_rate(nodes, services["mysql"])
print("average data arrival rate: %f Kb/s\n" % (Xw))
#-----------------------------------------------
if Xw == float(0):
mtp = 1
else:
mtp = (Xw * R_ - Uw_cpu) / (Xw * R_ * Uw_cpu)
print(R_)
print("new number of containers should be %f x" % (mtp))
NewCtnNum = math.ceil(CtnNum / mtp)
print(
"--> Given the utilization here, we want new number of containers in this tier to be (U/(1-U)/R_): ",