please i need corect answear Implement Lamport’s logical clocks with three process p1, p2, p3 where each clock duration at 3, 5, and 6 respectively
please i need corect answear Implement Lamport’s logical clocks with three process p1, p2, p3 where each clock duration at 3, 5, and 6 respectively
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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please i need corect answear
Implement Lamport’s logical clocks with three process p1, p2, p3 where each clock duration at 3, 5, and 6 respectively
Expert Solution
Step 1
For master clock serve
#Python3 program imitating a clock server
from functools import reduce from dateutil import parser.
import threading import datetime
import socket
import time
# datastructure used to store client address and clock data client data ()
M nested thread function used to receive clock time fron a connected client
def startRecieveingClockTime(connector, address):
while True: # recieve clock time
clock_time_string = connector.recv(1024).decode() clock_time = parser.parse(clock_time_string) clock time diff datetime.datetime.now() -
clock_time
client_data[address] (
"clock_time"
:clock_time, "time difference" clock time diff..
"connector
: connector
print("Client Data updated with: + str(address),
end "\n\n")
time.sleep(5)
master thread function used to open portal for accepting clients over given port def startConnecting(master_server):
#fetch clock time at slaves / clients while True:
# accepting a client / slave clock client master slave connector, addr master server.accept() slave address = str(addr[0])+" + str(addr[1])
print(slave_address" got connected successfully")
current thread threading. Thread(
target startRecieveingClockTime, args = (master slave_connector,
slave address, ))
current_thread.start()
#subroutine function used to fetch average clock difference def getAverageClockDiff():
current client data = client_data.copy()
time_difference_list = list(client'time_difference"]
for client_addr, client in client data.items())
sum_of_clock_difference = sum(time difference list,
datetime, timedelta(0, 0))
average_clock_difference = sum_of_clock_difference \
/ len(client_data)
return average_clock_difference
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