Feedback Control for Computer Systems

Overview

How can you take advantage of feedback control for enterprise programming? With this book, author Philipp K. Janert demonstrates how the same principles that govern cruise control in your car also apply to data center management and other enterprise systems. Through case studies and hands-on simulations, you’ll learn methods to solve several control issues, including mechanisms to spin up more servers automatically when web traffic spikes.

Feedback is ideal for controlling ...

See more details below
Paperback
$37.19
BN.com price
(Save 7%)$39.99 List Price

Pick Up In Store

Reserve and pick up in 60 minutes at your local store

Other sellers (Paperback)
  • All (12) from $17.05   
  • New (8) from $22.14   
  • Used (4) from $17.05   
Feedback Control for Computer Systems

Available on NOOK devices and apps  
  • NOOK Devices
  • NOOK HD/HD+ Tablet
  • NOOK
  • NOOK Color
  • NOOK Tablet
  • Tablet/Phone
  • NOOK for Windows 8 Tablet
  • NOOK for iOS
  • NOOK for Android
  • NOOK Kids for iPad
  • PC/Mac
  • NOOK for Windows 8
  • NOOK for PC
  • NOOK for Mac
  • NOOK Study
  • NOOK for Web

Want a NOOK? Explore Now

NOOK Book (eBook)
$18.99
BN.com price
(Save 44%)$33.99 List Price

Overview

How can you take advantage of feedback control for enterprise programming? With this book, author Philipp K. Janert demonstrates how the same principles that govern cruise control in your car also apply to data center management and other enterprise systems. Through case studies and hands-on simulations, you’ll learn methods to solve several control issues, including mechanisms to spin up more servers automatically when web traffic spikes.

Feedback is ideal for controlling large, complex systems, but its use in software engineering raises unique issues. This book provides basic theory and lots of practical advice for programmers with no previous background in feedback control.

  • Learn feedback concepts and controller design
  • Get practical techniques for implementing and tuning controllers
  • Use feedback “design patterns” for common control scenarios
  • Maintain a cache’s “hit rate” by automatically adjusting its size
  • Respond to web traffic by scaling server instances automatically
  • Explore ways to use feedback principles with queueing systems
  • Learn how to control memory consumption in a game engine
  • Take a deep dive into feedback control theory
Read More Show Less

Product Details

  • ISBN-13: 9781449361693
  • Publisher: O'Reilly Media, Incorporated
  • Publication date: 10/30/2013
  • Edition number: 1
  • Pages: 336
  • Sales rank: 1,388,911
  • Product dimensions: 6.00 (w) x 8.90 (h) x 0.80 (d)

Meet the Author

Philipp K. Janert was born and raised in Germany. He obtained aPh.D. in Theoretical Physics from the University of Washington in 1997and has been working in the tech industry since, including four yearsat Amazon.com, where he initiated and led several projects to improveAmazon's order fulfillment process. He is the author of two books ondata analysis, including the best-selling "Data Analysis with OpenSource Tools" (O'Reilly, 2010), and his writings have appeared onPerl.com, IBM developerWorks, IEEE Software, and in the LinuxMagazine. He has contributed to CPAN and other open-sourceprojects. He lives in the Pacific Northwest.

Read More Show Less

Table of Contents

Preface;
What Is Feedback?;
Why This Book?;
How to Read This Book;
Conventions Used in This Book;
Using Code Examples;
Safari® Books Online;
How to Contact Us;
Acknowledgments;
Foundations;
Chapter 1: Why Feedback? An Invitation;
1.1 A Hands-On Example;
1.2 Hoping for the Best;
1.3 Establishing Control;
1.4 Adding It Up;
1.5 Summary;
1.6 Code to Play With;
Chapter 2: Feedback Systems;
2.1 Systems and Signals;
2.2 Tracking Error and Corrective Action;
2.3 Stability, Performance, Accuracy;
2.4 Uncertainty and Change;
2.5 Feedback and Enterprise Systems;
2.6 Code to Play With;
Chapter 3: System Dynamics;
3.1 Lags and Delays;
3.2 Dynamics in the Physical World and in the Virtual World;
3.3 The Importance of Lags and Delays for Feedback Loops;
3.4 Theory and Practice;
3.5 Code to Play With;
Chapter 4: Controllers;
4.1 Block Diagrams;
4.2 On/Off Control;
4.3 Proportional Control;
4.4 Integral Control;
4.5 Derivative Control;
4.6 The Three-Term or PID Controller;
4.7 Code to Play With;
Chapter 5: Identifying Input and Output Signals;
5.1 Control Input and Output;
5.2 Examples;
5.3 Criteria for Selecting Control Signals;
5.4 A Note on Multidimensional Systems;
Chapter 6: Review and Outlook;
6.1 The Feedback Idea;
6.2 Iteration;
6.3 Process Knowledge;
6.4 Avoiding Instability;
6.5 The Setpoint;
6.6 Control, Not Optimization;
Practice;
Chapter 7: Theory Preview;
7.1 Frequency Representation;
7.2 The Transfer Function;
7.3 Block-Diagram Algebra;
7.4 PID Controllers;
7.5 Poles of the Transfer Function;
7.6 Process Models;
Chapter 8: Measuring the Transfer Function;
8.1 Static Input/Output Relation: The Process Characteristic;
8.2 Dynamic Response to a Step Input: The Process Reaction Curve;
8.3 Process Models;
8.4 Other Methods of System Identification;
Chapter 9: PID Tuning;
9.1 Tuning Objectives;
9.2 General Effect of Changes to Controller Parameters;
9.3 Ziegler–Nichols Tuning;
9.4 Semi-Analytical Tuning Methods;
9.5 A Closer Look at Controller Tuning Formulas;
Chapter 10: Implementation Issues;
10.1 Actuator Saturation and Integrator Windup;
10.2 Smoothing the Derivative Term;
10.3 Choosing a Sampling Interval;
10.4 Variants of the PID Controller;
10.5 Nonlinear Controllers;
Chapter 11: Common Feedback Architectures;
11.1 Changing Operating Conditions: Gain Scheduling;
11.2 Large Disturbances: Feedforward;
11.3 Fast and Slow Dynamics: Nested or “Cascade” Control;
11.4 Systems Involving Delays: The Smith Predictor;
Case Studies;
Chapter 12: Exploring Control Systems Through Simulation;
12.1 The Case Studies;
12.2 Modeling Time;
12.3 The Simulation Framework;
Chapter 13: Case Study: Cache Hit Rate;
13.1 Defining Components;
13.2 Measuring System Characteristics;
13.3 Controller Tuning;
13.4 Simulation Code;
Chapter 14: Case Study: Ad Delivery;
14.1 The Situation;
14.2 Measuring System Characteristics;
14.3 Establishing Control;
14.4 Improving Performance;
14.5 Variations;
14.6 Simulation Code;
Chapter 15: Case Study: Scaling Server Instances;
15.1 The Situation;
15.2 Measuring and Tuning;
15.3 Reaching 100 Percent With a Nonstandard Controller;
15.4 Dealing with Latency;
15.5 Simulation Code;
Chapter 16: Case Study: Waiting-Queue Control;
16.1 On the Nature of Queues and Buffers;
16.2 The Architecture;
16.3 Setup and Tuning;
16.4 Derivative Control to the Rescue;
16.5 Controller Alternatives;
16.6 Simulation Code;
Chapter 17: Case Study: Cooling Fan Speed;
17.1 The Situation;
17.2 The Model;
17.3 Tuning and Commissioning;
17.4 Closed-Loop Performance;
17.5 Simulation Code;
Chapter 18: Case Study: Controlling Memory Consumption in a Game Engine;
18.1 The Situation;
18.2 Problem Analysis;
18.3 Architecture Alternatives;
18.4 Results;
18.5 Simulation Code;
Chapter 19: Case Study Wrap-Up;
19.1 Simple Controllers, Simple Loops;
19.2 Measuring and Tuning;
19.3 Staying in Control;
19.4 Dealing with Noise;
Theory;
Chapter 20: The Transfer Function;
20.1 Differential Equations;
20.2 Laplace Transforms;
20.3 Using the Laplace Transform to Solve Differential Equations;
20.4 The Transfer Function;
20.5 What If the Differential Equation Is Not Known?;
Chapter 21: Block-Diagram Algebra and the Feedback Equation;
21.1 Composite Systems;
21.2 The Feedback Equation;
21.3 Block-Diagram Algebra;
21.4 Limitations and Importance of Transfer Function Methods;
Chapter 22: PID Controllers;
22.1 The Transfer Function of the PID Controller;
22.2 The Canonical Form of the PID Controller;
22.3 The General Controller;
22.4 Proportional Droop Revisited;
Chapter 23: Poles and Zeros;
23.1 Structure of a Transfer Function;
23.2 Effect of Poles and Zeros;
23.3 Pole Positions and Response Patterns;
23.4 What to Do About Delays;
Chapter 24: Root Locus Techniques;
24.1 Construction of Root Locus Diagrams;
24.2 Root Locus or “Evans” Rules;
24.3 Angle and Magnitude Criteria;
24.4 Practical Issues;
24.5 Examples;
Chapter 25: Frequency Response and the Bode Plot;
25.1 Frequency Response;
25.2 The Bode Plot;
25.3 A Criterion for Marginal Stability;
25.4 Other Graphical Techniques;
Chapter 26: Topics Beyond This Book;
26.1 Discrete-Time Modeling and the z-Transform;
26.2 State-Space Methods;
26.3 Robust Control;
26.4 Optimal Control;
26.5 Mathematical Control Theory;
Appendices;
Glossary;
Creating Graphs with Gnuplot;
Basic Plotting;
Plot Ranges;
Inline Transformations;
Plotting Simulation Results;
Summary;
Complex Numbers;
Basic Operations;
Polar Coordinates;
The Complex Exponential;
Further Reading;
Recommended Reading;
Additional References;
Mathematical Prerequisites;
Colophon;

Read More Show Less

Customer Reviews

Be the first to write a review
( 0 )
Rating Distribution

5 Star

(0)

4 Star

(0)

3 Star

(0)

2 Star

(0)

1 Star

(0)

Your Rating:

Your Name: Create a Pen Name or

Barnes & Noble.com Review Rules

Our reader reviews allow you to share your comments on titles you liked, or didn't, with others. By submitting an online review, you are representing to Barnes & Noble.com that all information contained in your review is original and accurate in all respects, and that the submission of such content by you and the posting of such content by Barnes & Noble.com does not and will not violate the rights of any third party. Please follow the rules below to help ensure that your review can be posted.

Reviews by Our Customers Under the Age of 13

We highly value and respect everyone's opinion concerning the titles we offer. However, we cannot allow persons under the age of 13 to have accounts at BN.com or to post customer reviews. Please see our Terms of Use for more details.

What to exclude from your review:

Please do not write about reviews, commentary, or information posted on the product page. If you see any errors in the information on the product page, please send us an email.

Reviews should not contain any of the following:

  • - HTML tags, profanity, obscenities, vulgarities, or comments that defame anyone
  • - Time-sensitive information such as tour dates, signings, lectures, etc.
  • - Single-word reviews. Other people will read your review to discover why you liked or didn't like the title. Be descriptive.
  • - Comments focusing on the author or that may ruin the ending for others
  • - Phone numbers, addresses, URLs
  • - Pricing and availability information or alternative ordering information
  • - Advertisements or commercial solicitation

Reminder:

  • - By submitting a review, you grant to Barnes & Noble.com and its sublicensees the royalty-free, perpetual, irrevocable right and license to use the review in accordance with the Barnes & Noble.com Terms of Use.
  • - Barnes & Noble.com reserves the right not to post any review -- particularly those that do not follow the terms and conditions of these Rules. Barnes & Noble.com also reserves the right to remove any review at any time without notice.
  • - See Terms of Use for other conditions and disclaimers.
Search for Products You'd Like to Recommend

Recommend other products that relate to your review. Just search for them below and share!

Create a Pen Name

Your Pen Name is your unique identity on BN.com. It will appear on the reviews you write and other website activities. Your Pen Name cannot be edited, changed or deleted once submitted.

 
Your Pen Name can be any combination of alphanumeric characters (plus - and _), and must be at least two characters long.

Continue Anonymously

    If you find inappropriate content, please report it to Barnes & Noble
    Why is this product inappropriate?
    Comments (optional)