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Our society increasingly depends on computer-based systems; the number of applications deployed has increased dramatically in recent years and this trend is accelerating. Many of these applications are expected to provide their services continuously. The Service Availability Forum has recognized this need and developed a set of specifications to help software designers and developers to focus on the value added function of applications, leaving the availability management functions for the middleware. A practical and informative reference for the Service Availability Forum specifications, this book gives a cohesive explanation of the founding principles, motivation behind the design of the specifications, and the solutions, usage scenarios and limitations that a final system may have. Avoiding complex mathematical explanations, the book takes a pragmatic approach by discussing issues that are as close as possible to the daily software design/development by practitioners, and yet at a level that still takes in the overall picture. As a result, practitioners will be able to use the specifications as intended. Takes a practical approach, giving guidance on the use of the specifications to explain the architecture, redundancy models and dependencies of the Service Availability (SA) Forum services Explains how service availability provides fault tolerance at the service level Clarifies how the SA Forum solution is supported by open source implementations of the middleware Includes fragments of code, simple example and use cases to give readers a practical understanding of the topic Provides a stepping stone for applications and system designers, developers and advanced students to help them understand and use the specifications
The overwhelming majority of a software system’s lifespan is spent in use, not in design or implementation. So, why does conventional wisdom insist that software engineers focus primarily on the design and development of large-scale computing systems? In this collection of essays and articles, key members of Google’s Site Reliability Team explain how and why their commitment to the entire lifecycle has enabled the company to successfully build, deploy, monitor, and maintain some of the largest software systems in the world. You’ll learn the principles and practices that enable Google engineers to make systems more scalable, reliable, and efficient—lessons directly applicable to your organization. This book is divided into four sections: Introduction—Learn what site reliability engineering is and why it differs from conventional IT industry practices Principles—Examine the patterns, behaviors, and areas of concern that influence the work of a site reliability engineer (SRE) Practices—Understand the theory and practice of an SRE’s day-to-day work: building and operating large distributed computing systems Management—Explore Google's best practices for training, communication, and meetings that your organization can use
This book constitutes the refereed proceedings of the 5th International Service Availability Symposium, ISAS 2008, held in Tokyo, Japan, in May 2008. The 12 revised full papers presented together with 2 keynote papers and 2 tutorials were carefully reviewed and selected from 28 submissions. The papers are organized in topical sections on enterprise system dependability, software service availability, service availability platform, and service dependability analysis.
This book constitutes the thoroughly refereed post-proceedings of the First International Service Availability Symposium, ISAS 2004, held in Munich, Germany in May 2004. The 15 revised full papers presented were carefully selected from 28 submissions during two rounds of reviewing and improvement. Among the topics addressed are high availability database architectures, data persistence, dependable mobile Internet services, System Availability Forum standards, QoS control, middleware, service-level management, service management, location-based services, service robustness, service availability evaluation, continuous services, AMF services, etc.
This book constitutes the thoroughly refereed post-proceedings of the Third International Service Availability Symposium, ISAS 2006, held in Helsinki, Finland, in May 2006. The 19 revised full papers cover availability modeling, estimation and analysis, dependability techniques and their applications, performability: measurements and assessments, service availability standards: experience reports and futures.
This book constitutes the thoroughly refereed proceedings of the 14 the European Workshop on Dependable Computing, EWDC 2013, held in Coimbra, Portugal, in May 2013. The 9 full papers and 6 short papers presented were carefully reviewed and selected from 24 submissions. Also included in the volume are 6 fast abstracts presenting work in progress or new ideas in the dependability area. The papers are organized in topical sections on wireless sensor networks; cloud computing and services; testing and fault detection, fault injection and benchmarking and dependable and secure computing.
Updated as of January 1, 2018, this guide includes relevant guidance contained in applicable standards and other technical sources. It explains the relationship between a service organization and its user entities, provides examples of service organizations, describes the description criteria to be used to prepare the description of the service organization’s system, identifies the trust services criteria as the criteria to be used to evaluate the design and operating effectiveness of controls, explains the difference between a type 1 and type 2 SOC 2 report, and provides illustrative reports for CPAs engaged to examine and report on system and organization controls at a service organization. It also describes the matters to be considered and procedures to be performed by the service auditor in planning, performing, and reporting on SOC 2 and SOC 3 engagements. New to this edition are: Updated for SSAE No. 18 (clarified attestation standards), this guide has been fully conformed to reflect lessons learned in practice Contains insight from expert authors on the SOC 2 working group composed of CPAs who perform SOC 2 and SOC 3 engagements Includes illustrative report paragraphs describing the matter that gave rise to the report modification for a large variety of situations Includes a new appendix for performing and reporting on a SOC 2 examination in accordance with International Standards on Assurance Engagements (ISAEs) or in accordance with both the AICPA’s attestation standards and the ISAEs
A holistic approach to service reliability and availability of cloud computing Reliability and Availability of Cloud Computing provides IS/IT system and solution architects, developers, and engineers with the knowledge needed to assess the impact of virtualization and cloud computing on service reliability and availability. It reveals how to select the most appropriate design for reliability diligence to assure that user expectations are met. Organized in three parts (basics, risk analysis, and recommendations), this resource is accessible to readers of diverse backgrounds and experience levels. Numerous examples and more than 100 figures throughout the book help readers visualize problems to better understand the topic—and the authors present risks and options in bulleted lists that can be applied directly to specific applications/problems. Special features of this book include: Rigorous analysis of the reliability and availability risks that are inherent in cloud computing Simple formulas that explain the quantitative aspects of reliability and availability Enlightening discussions of the ways in which virtualized applications and cloud deployments differ from traditional system implementations and deployments Specific recommendations for developing reliable virtualized applications and cloud-based solutions Reliability and Availability of Cloud Computing is the guide for IS/IT staff in business, government, academia, and non-governmental organizations who are moving their applications to the cloud. It is also an important reference for professionals in technical sales, product management, and quality management, as well as software and quality engineers looking to broaden their expertise.
Breast cancer is the most common cancer among women that affects mostly those in middle and older age groups in most parts of the world. The incidence is showing an increasing trend affecting younger women and the cost to prevent, treat and manage this chronic disease is continuously escalating. Universal Health Coverage (UHC) is an initiative by World Health Organisation that encourages policy makers in all countries in the world to organise their health systems that are responsive in providing access to quality health care to every citizen in need of health services without facing the financial hardship. Malaysia health system has been well developed and was said to have achieved universal health coverage based on the easy access to primary and secondary health care services in the public sector. In this book, we present our effort to assess if Malaysia provides UHC for preventive, curative and palliative to breast cancer patients . At the inception of the study, we embarked on the development of a composite index to assess the overall status of UHC. This is followed by an extensive research to explore the extent of financial coverage for management of breast cancer. Over 300 patients in various stages of the breast cancer attending the selected public tertiary hospitals were interviewed and their medical records reviewed to assess their health spending and to estimate the incidence of catastrophic health expenditure. The book is the first of its kind that provides comprehensive real-world data on universal coverage for breast cancer patients in the world.
Although service-level objectives (SLOs) continue to grow in importance, there’s a distinct lack of information about how to implement them. Practical advice that does exist usually assumes that your team already has the infrastructure, tooling, and culture in place. In this book, recognized SLO expert Alex Hidalgo explains how to build an SLO culture from the ground up. Ideal as a primer and daily reference for anyone creating both the culture and tooling necessary for SLO-based approaches to reliability, this guide provides detailed analysis of advanced SLO and service-level indicator (SLI) techniques. Armed with mathematical models and statistical knowledge to help you get the most out of an SLO-based approach, you’ll learn how to build systems capable of measuring meaningful SLIs with buy-in across all departments of your organization. Define SLIs that meaningfully measure the reliability of a service from a user’s perspective Choose appropriate SLO targets, including how to perform statistical and probabilistic analysis Use error budgets to help your team have better discussions and make better data-driven decisions Build supportive tooling and resources required for an SLO-based approach Use SLO data to present meaningful reports to leadership and your users