The Complete Guide to Optimizing Systems Performance Written by the winner of the 2013 LISA Award for Outstanding Achievement in System Administration Large-scale enterprise, cloud, and virtualized computing systems have introduced serious performance challenges. 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.

The system design interview is considered to be the most complex and most difficult technical job interview by many. Those questions are intimidating, but don't worry. It's just that nobody has taken the time to prepare you systematically. We take the time. We go slow. We draw lots of diagrams and use lots of examples. You'll learn step-by-step, one question at a time.Don't miss out.What's inside?- An insider's take on what interviewers really look for and why.- A 4-step framework for solving any system design interview question.- 16 real system design interview questions with detailed solutions.- 188 diagrams to visually explain how different systems work.

Crisis Preparedness Handbook is a straight-forward guide for becoming personally prepared to handle natural disasters and man-caused disruptions. It motivates people to prepare for emergencies and breaks it down into manageable tasks. The 464-page guide covers preparedness topics including water storage and purification, short- and long-term food storage, and growing and preserving food. It includes advice about managing heating, cooking, lighting, and refrigeration, preparing your shelter, dealing with medical emergencies, taking care of sanitation and personal care, arranging alternative transportation and communications, and surviving civil unrest and terrorism. Its user-friendly format organizes information in tables, quick-checks, and worksheets. Simple suggestions in each chapter and personal anecdotes help the reader see that becoming prepared is an achievable goal. A resource section and a detailed index further assists the reader.

Does the identification number 60 indicate a toxic substance or a flammable solid, in the molten state at an elevated temperature? Does the identification number 1035 indicate ethane or butane? What is the difference between natural gas transmission pipelines and natural gas distribution pipelines? If you came upon an overturned truck on the highway that was leaking, would you be able to identify if it was hazardous and know what steps to take? Questions like these and more are answered in the Emergency Response Guidebook. Learn how to identify symbols for and vehicles carrying toxic, flammable, explosive, radioactive, or otherwise harmful substances and how to respond once an incident involving those substances has been identified. Always be prepared in situations that are unfamiliar and dangerous and know how to rectify them. Keeping this guide around at all times will ensure that, if you were to come upon a transportation situation involving hazardous substances or dangerous goods, you will be able to help keep others and yourself out of danger. With color-coded pages for quick and easy reference, this is the official manual used by first responders in the United States and Canada for transportation incidents involving dangerous goods or hazardous materials.

Fruits and vegetables are some of the most expensive parts of any regular menu in your home. With rising transportation costs, a food increase in the summer of 2008 of almost 2 percent, and continually shrinking supplies, the cost of maintaining a healthy supply of these necessary staples is becoming harder and harder for many families. However, with the right resources and planning, you can take advantage of an age old method of storage that will allow you to buy fruits and vegetables when they are least expensive or to grow your own and store them for future use. This book will walk anyone through the process of building and using a root cellar to store their fruits and vegetables for later use, through the cold winter months when even the most basic items can cost an arm and a leg. Before even starting your root cellar, you will learn the basics of choosing the right crops and planting them at the right time or buying them in advance for your root cellar. You will learn how to know which crops and which specific vegetables and fruits are good to keep and which ones should be left alone. You will learn how and when to bring in the harvest and how to prepare for storage effectively. You will learn the basics of spoilage and what to expect from your foods. You will learn what to expect each winter for multiple month storage and which vegetables and fruits to start expecting in your cellar. You will also benefit from interviews with the top experts in the field of storage and root cellaring and farmers who have been storing vegetables for years. You will learn how to start your own underground garden and what various types of cellars exist trenches, closets, and hideaways. You will learn how to start planning your root cellar, how to utilise your basement if you so desire and how to start excavating and preparing it for the first harvest. No matter your situation or your crops, you can benefit from this book and its take on the world of root cellaring and long term fruit and vegetable storage.

This IBM® Redbooks publication introduces and describes the IBM Elastic Storage® Server 3000 (ESS 3000) as a scalable, high-performance data and file management solution. The solution is built on proven IBM Spectrum® Scale technology, formerly IBM General Parallel File System (IBM GPFS). IBM Elastic Storage System 3000 is an all-Flash array platform. This storage platform uses NVMe-attached drives in ESS 3000 to provide significant performance improvements as compared to SAS-attached flash drives. This book provides a technical overview of the ESS 3000 solution and helps you to plan the installation of the environment. We also explain the use cases where we believe it fits best. Our goal is to position this book as the starting point document for customers that would use ESS 3000 as part of their IBM Spectrum Scale setups. This book is targeted toward technical professionals (consultants, technical support staff, IT Architects, and IT Specialists) who are responsible for delivering cost-effective storage solutions with ESS 3000.

Perform fast interactive analytics against different data sources using the Presto high-performance, distributed SQL query engine. With this practical guide, you�?�¢??ll learn how to conduct analytics on data where it lives, whether it�?�¢??s Hive, Cassandra, a relational database, or a proprietary data store. Analysts, software engineers, and production engineers will learn how to manage, use, and even develop with Presto. Initially developed by Facebook, open source Presto is now used by Netflix, Airbnb, LinkedIn, Twitter, Uber, and many other companies. Matt Fuller, Manfred Moser, and Martin Traverso show you how a single Presto query can combine data from multiple sources to allow for analytics across your entire organization. Get started: Explore Presto�?�¢??s use cases and learn about tools that will help you connect to Presto and query data Go deeper: Learn Presto�?�¢??s internal workings, including how to connect to and query data sources with support for SQL statements, operators, functions, and more Put Presto in production: Secure Presto, monitor workloads, tune queries, and connect more applications; learn how other organizations apply Presto