Now, internationally renowned performance expert Brendan Gregg has brought together proven methodologies, tools, and metrics for analyzing and tuning even the most complex environments. Systems Performance: Enterprise and the Cloud focuses on Linux(R) and Unix(R) performance, while illuminating performance issues that are relevant to all operating systems. You'll gain deep insight into how systems work and perform, and learn methodologies for analyzing and improving system and application performance. Gregg presents examples from bare-metal systems and virtualized cloud tenants running Linux-based Ubuntu(R), Fedora(R), CentOS, and the illumos-based Joyent(R) SmartOS(TM) and OmniTI OmniOS(R). He systematically covers modern systems performance, including the "traditional" analysis of CPUs, memory, disks, and networks, and new areas including cloud computing and dynamic tracing. This book also helps you identify and fix the "unknown unknowns" of complex performance: bottlenecks that emerge from elements and interactions you were not aware of. The text concludes with a detailed case study, showing how a real cloud customer issue was analyzed from start to finish. Coverage includes - Modern performance analysis and tuning: terminology, concepts, models, methods, and techniques - Dynamic tracing techniques and tools, including examples of DTrace, SystemTap, and perf - Kernel internals: uncovering what the OS is doing - Using system observability tools, interfaces, and frameworks - Understanding and monitoring application performance - Optimizing CPUs: processors, cores, hardware threads, caches, interconnects, and kernel scheduling - Memory optimization: virtual memory, paging, swapping, memory architectures, busses, address spaces, and allocators - File system I/O, including caching - Storage devices/controllers, disk I/O workloads, RAID, and kernel I/O - Network-related performance issues: protocols, sockets, interfaces, and physical connections - Performance implications of OS and hardware-based virtualization, and new issues encountered with cloud computing - Benchmarking: getting accurate results and avoiding common mistakes This guide is indispensable for anyone who operates enterprise or cloud environments: system, network, database, and web admins; developers; and other professionals. For students and others new to optimization, it also provides exercises reflecting Gregg's extensive instructional experience.

    Take advantage of several preloaded programming languages. Use the Raspberry Pi with Arduino. Create Internet-connected projects. Play with multimedia. With Raspberry Pi, you can do all of this and more.Get acquainted with hardware features on the Pi’s boardLearn enough Linux to move around the operating systemPick up the basics of Python and Scratch—and start programmingDraw graphics, play sounds, and handle mouse events with the Pygame frameworkUse the Pi’s input and output pins to do some hardware hackingDiscover how Arduino and the Raspberry Pi complement each otherIntegrate USB webcams and other peripherals into your projectsCreate your own Pi-based web server with Python

    'Big data', 'data science', and 'machine learning' have become familiar terms in the news, as statistical methods are brought to bear upon the enormous data sets of modern science and commerce. How did we get here? And where are we going? This book takes us on an exhilarating journey through the revolution in data analysis following the introduction of electronic computation in the 1950s. Beginning with classical inferential theories - Bayesian, frequentist, Fisherian - individual chapters take up a series of influential topics: survival analysis, logistic regression, empirical Bayes, the jackknife and bootstrap, random forests, neural networks, Markov chain Monte Carlo, inference after model selection, and dozens more. The distinctly modern approach integrates methodology and algorithms with statistical inference. The book ends with speculation on the future direction of statistics and data science.

    In Analysis Patterns: Reusable Object Models, Martin Fowler focuses on the end result of object-oriented analysis and design - the models themselves. He shares with you his wealth of object modeling experience and his keen eye for identifying repeating problems and transforming them into reusable models. Analysis Patterns provides a catalogue of patterns that have emerged in a wide range of domains including trading, measurement, accounting and organizational relationships. Recognizing that conceptual patterns cannot exist in isolation, the author also presents a series of support patterns that discuss how to turn conceptual models into software that in turn fits into an architecture for a large information system. Included in each pattern is the reasoning behind their design, rules for when they should and should not be used, and tips for implementation. The examples presented in this book comprise a cookbook of useful models and insight into the skill of reuse that will improve analysis, modeling and implementation.

    An extensive subject review covers the following general areas: Foundations of World Civilization (8000 B.C.–1000 A.D.) World Cultures Maturing (1000–1450) World Cultures Interacting (1450–1750) World Cultures in the Modern Era (1750–1914) The 20th Century and Contemporary World Cultures (1914–2009)

    Ideal as a quick reference, Regular Expression Pocket Reference covers the regular expression APIs for Perl 5.8, Ruby (including some upcoming 1.9 features), Java, PHP, .NET and C#, Python, vi, JavaScript, and the PCRE regular expression libraries. This concise and easy-to-use reference puts a very powerful tool for manipulating text and data right at your fingertips. Composed of a mixture of symbols and text, regular expressions can be an outlet for creativity, for brilliant programming, and for the elegant solution. Regular Expression Pocket Reference offers an introduction to regular expressions, pattern matching, metacharacters, modes and constructs, and then provides separate sections for each of the language APIs, with complete regex listings including:Supported metacharacters for each language API Regular expression classes and interfaces for Ruby, Java, .NET, and C# Regular expression operators for Perl 5.8 Regular expression module objects and functions for Python Pattern-matching functions for PHP and the vi editor Pattern-matching methods and objects for JavaScript Unicode Support for each of the languages With plenty of examples and other resources, Regular Expression Pocket Reference summarizes the complex rules for performing this critical text-processing function, and presents this often-confusing topic in a friendly and well-organized format. This guide makes an ideal on-the-job companion.

    When one young penguin realizes his hair is all the wrong colors, how far will he go to stop the stares?Spike the Penguin wishes he wasn’t different. Even though his parents tell him his bright red, orange, yellow, green, blue, and purple mohawk is beautiful, he still wants to hide his head under his flippers. Determined to find a way to be like everyone else, the sad little guy sets out on an Antarctic adventure!Diving deep into the ocean to seek a solution, Spike tries out seashell hats, squid-ink dye jobs, and a seal hair salon. But when no one can make him look just right, he fears he’ll never be happy… until his friends share something unexpected.Can this little penguin learn to appreciate his perfectly awesome plumage?Spike, The Penguin With Rainbow Hair is a heartwarming children’s picture book written in playful rhyme that shares a great message about self acceptance.

    Over 450 photographs, drawings, and diagrams reveal in exquisite detail the hows, whys, and how-to's of the traditional craft of guitarmaking, all accompanied by fascinating historical and technical notes. A comprehensive bibliography; a list of tools, materials, and supply sources; and a full index complete this uniquely authoritative reference -- and essential acquisition -- for guitar and craft enthusiasts, woodworkers, and students of instrument making everywhere.

    And since browser incompatibility is the biggest CSS headache for most developers, it also includes an invaluable chart displaying detailed information about CSS support for every style element across all browsers. For anyone who wants to correctly implement CSS, this book condenses all the details in its companion volume, "Cascading Style Sheets: The Definitive Guide," into one easy-to-use cheat-sheet.The "CSS Pocket Reference" delivers just the CSS details that you need to complete the task at hand. When you're stuck and want an answer quickly, the tiny "CSS Pocket Reference" is the book you'll want by your keyboard or in your back pocket. (Yes, it really does fit in a back pocket, but it's too useful to stay there long.)

    This causes real problems for everyday users who need to make sense of all the information available, and for software engineers who want to make their text-based applications more useful and user-friendly. Whether building a search engine for a corporate website, automatically organizing email, or extracting important nuggets of information from the news, dealing with unstructured text can be daunting.Taming Text is a hands-on, example-driven guide to working with unstructured text in the context of real-world applications. It explores how to automatically organize text, using approaches such as full-text search, proper name recognition, clustering, tagging, information extraction, and summarization. This book gives examples illustrating each of these topics, as well as the foundations upon which they are built.Purchase of the print book comes with an offer of a free PDF, ePub, and Kindle eBook from Manning. Also available is all code from the book.

    Designed for readers who don't need the academic formality, it's a fast and easy computer science guide. It teaches essential concepts for people who want to program computers effectively. First, it introduces discrete mathematics, then it exposes the most common algorithms and data structures. It also shows the principles that make computers and programming languages work.

    That's why Elizabeth Castro has written HTML 4 for the World Wide Web, Fourth Edition: Visual QuickStart Guide, an update to her blockbuster guide to HTML 4. You'll find all the concise, practical advice--and fun examples--that made the first edition a worldwide bestseller, plus entirely new coverage of debugging, JavaScript, and using tables for page layout, and an expanded section on Cascading Style Sheets.Like all the books in the Visual QuickStart series, this one breaks even the most complex tasks into easy-to-follow steps illustrated with hundreds of screenshots and the actual code. The book presumes no prior knowledge of HTML, making it the perfect introduction for beginners. But its tabbed format and info-packed appendixes (on special HTML characters and Web-safe colors, for example) also make it a handy and indispensable reference for those who build Web pages for a living. Find out why Amazon called the previous edition a "dream guide" to HTML.

     Keller has been in love with the same girl for as long as he can remember, but she's never going to be his. After college football practice, he starts to notice a certain redhead that always seem to show up where he is. He isn't ready to be hurt by another girl, but she's almost too beautiful and tempting to resist. Athena has had a crush on Keller for over a year and watched him play football as she performed on the dance team. She knows it's probably hopeless, and he's never going to get over her friend Carter enough to notice her. But she still has to try and get his attention. Keller and Athena do find their way together, but can two people that come from opposite backgrounds make a future work? And will Keller ever be able to love Athena the way she loves him? Or will their pasts get in the way of a relationship that has become so important to both of them? This book is told in alternating POVs and has an HEA and no cliffhanger. This book is recommended for readers over the age of 17 due to strong language and explicit sexual content.

    Now updated for both current developments in OS 10.4 and 10.5, this comprehensive guide to developing Cocoa guides programmers through the key features of Cocoa, and takes them step by step through the creation of typical applications.

    Sipser's candid, crystal-clear style allows students at every level to understand and enjoy this field. His innovative "proof idea" sections explain profound concepts in plain English. The new edition incorporates many improvements students and professors have suggested over the years, and offers updated, classroom-tested problem sets at the end of each chapter.