I want solution to this question., JAVA Programming

Assignment Help:

This assignment is based on the principles of clock consistency and associated drifts in a distributed system. You have to create a simulation, running on a single machine, of a simple distributed system involving four process objects (PO). Each PO will contain a logical clock, a concept first proposed by Lamport.1 The concept of the logical clocks and associated synchronization, based on the following rules, will attempt to resolve the clock consistency in this system:
1. Each event (internal, send, or receive) in the system is associated with a time-stamp, based on logical clocks.
2. Each PO, Pi, will have an associated logical clock, LCi. This logical clock is implemented as a simple counter that is incremented whenever an event takes place within that PO. Since a logical clock has a monotonically increasing value, it assigns a unique number to every event. The time stamp of an event is the value of the logical clock for that event. Hence, if an event A occurs before an event B in Pi, then LCi(A) < LCi(B).
3. A Pi will randomly decide if it wants to carry out an internal event or send a message to some other Pj. If it decides to send a message to a randomly selected Pj then it will attach the value of its logical clock to that message. A Pi may also decide to receive a message from another Pj if that Pj has sent a message to the Pi earlier.
4. Whenever a Pj receives a message from another Pi, it will advance its logical clock if the time stamp associated with the incoming message is greater than or equal to the current value of its logical clock, i.e., if Pj, receives a message (event B) from Pi with a time stamp t and LCj(B) = t then Pj should advance its logical clock such that LCj (B) is equal to t + 1.
5. Any Pi, in the system, may exhibit Byzantine or arbitrary failures when it receives a message – e.g., it may choose not to advance its logical clock at all.
Your task is to:
1. Propose the interaction and failure models for this system. Discuss the pros and cons of your design.
2. Simulate this entire environment in C++ or Java using threads. Allow the simulation to reach a steady-state, i.e., run the program for a large number of iterations. During each iteration and at the end of the simulation compare the values of the logical clocks of POs – this comparison should indicate the clock drifts and their synchronizations. Repeat the simulation with different probabilities and access their effects on the clock drifts.
3. Create a brief report that indicates the aforementioned models and the analyses of the results of your simulation.

Related Discussions:- I want solution to this question.

Explain what occur when an object is created in java, Explain what occur wh...

Explain what occur when an object is created in Java?

Illustrate java management extensions (jmx)?, JMX framework can enhance the...

JMX framework can enhance the manageability of your application by  1. Monitoring your application for critical events, performance problems, and error condition statistics. E.g

Difference b/w redirecting a request and forwarding request, Both function...

Both functions send you to a new resource like JSP, Servlet etc.     Normal 0 false false false EN-US X-NONE X-NONE

I want fitlife app for android - ios, I want FitLIFE app for Android, IOS, ...

I want FitLIFE app for Android, IOS, Windows Project Description: Hello, I want to develop an app for Android, IOS and Windows Phone. This app will be work with open source B

Explain the term - garbage collection, Explain the term - Garbage Collectio...

Explain the term - Garbage Collection Java  performs  garbage  collection  and  eliminates  the  need  to  free  objects  explicitly.  When an object  has  no references   to

Different points where weaving can be applied, What are the different point...

What are the different points where weaving can be applied? Ans) There are three points ? Compile Time ? Classload Time ? Runtime

What do you understand by the term constructor in java, Question: (a) ...

Question: (a) What are the main differences between an object and a class? Illustrate with appropriate examples. (b) Differentiate between a global variable and a local va

Neatbeens and glass fish, Assignment 3 Project Proposal Documentation Descr...

Assignment 3 Project Proposal Documentation Description Marks out of Wtg(%) Due date Assignment 3 100 35% 15/09/14 In the assignment we will start analysing and designing the

What is the role of the jms provider, The JMS provider handles security of ...

The JMS provider handles security of the messages, data conversion and the client triggering. The JMS provider verifies the level of encryption and the security level of the messag

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd