To the outside world, a "supercomputer" appears to be a single system. In fact, it's a cluster of computers that share a local area network and have the ability to work together on a single problem as a team. Many businesses used to consider supercomputing beyond the reach of their budgets, but new Linux applications have made high-performance clusters more affordable than ever. These days, the promise of low-cost supercomputing is one of the main reasons many businesses choose Linux over other operating systems.This new guide covers everything a newcomer to clustering will need to plan, build, and deploy a high-performance Linux cluster. The book focuses on clustering for high-performance computation, although much of its information also applies to clustering for high-availability (failover and disaster recovery). The book discusses the key tools you'll need to get started, including good practices to use while exploring the tools and growing a system. You'll learn about planning, hardware choices, bulk installation of Linux on multiple systems, and other basic considerations. Then, you'll learn about software options that can save you hours–or even weeks–of deployment time.Since a wide variety of options exist in each area of clustering software, the author discusses the pros and cons of the major free software projects and chooses those that are most likely to be helpful to new cluster administrators and programmers. A few of the projects introduced in the book include:MPI, the most popular programming library for clusters. This book offers simple but realistic introductory examples along with some pointers for advanced use.OSCAR and Rocks, two comprehensive installation and administrative systemsopenMosix (a convenient tool for distributing jobs), Linux kernel extensions that migrate processes transparently for load balancingPVFS, one of the parallel filesystems that make clustering I/O easierC3, a set of commands for administering multiple systemsGanglia, OpenPBS, and cloning tools (Kickstart, SIS and G4U) are also covered. The book looks at cluster installation packages (OSCAR & Rocks) and then considers the core packages individually for greater depth or for folks wishing to do a custom installation. Guidelines for debugging, profiling, performance tuning, and managing jobs from multiple users round out this immensely useful book.
Power evolves. At the beginning of the twenty-first century, unsurpassed in military strength and ownership of world resources, the United States was indisputably the most powerful nation in the world. But the global information age is rendering these traditional markers of power obsolete. To remain at the pinnacle of world power, the United States must adopt a strategy that considers the impact of the internet on global power resources. The Future of Power examines what it means to be powerful in the twenty-first century and illuminates the road ahead.
Protect your network and web sites from malicious attacks with help from this cutting-edge guide. Extreme Exploits is packed with never-before-published advanced security techniques and concise instructions that explain how to defend against devastating vulnerabilities in software and network infrastructure. This book will give a detailed analysis of modern threats and their solutions along with a checklist for developing defenses at the end of each chapter. You’ll also be introduced to a winning methodology for custom vulnerability assessments including attack profiling and the theatre of war concept. Through in-depth explanations of underlying technologies, you’ll learn to prepare your network and software from threats that don’t yet exist. This is a must-have volume for anyone responsible for network security.
A straightforward guide to optimizing information assets in the networked enterprise, this book includes extended, unpublished case studies from major industry with thorough implementation guidance. The text is supported by many tables, flow charts and graphical models.
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