Breaking The Availability Barrier Iii

This book is Volume 2 of a three-part series on active/active systems. It describes techniques that can be used today for extending system failure times from years to centuries, often at little or no additional cost. As our daily lives and corporate well-being become more dependent upon computers, system reliability grows increasingly important. No longer are frequent system outages acceptable. In many cases, failure intervals must now be measured in centuries. Starting with a summary of Volume 1, techniques for achieving extraordinary availabilities are reviewed. These techniques use active/active architectures, in which multiple independent nodes using a common distributed database are cooperating in a common application. Should a node fail, all that is required is to switch the users on that node to a surviving node. Equally important to the achievement of high availability is the ability to upgrade the system hardware and software without denying service to the users. The procedures to do this within an active/active system are described. The secret to high availability is to let it fail, but fix it fast. This volume explores the server, database, and network redundancy techniques that allow fast-fix to happen. The cost considerations involved in such redundant architectures are also explored.

The Bhagavad Gita is a world-scripture with a world message, It is not meant for India alone: it is a "Bible of Humanity". The Gita has an answer to the problems and perplexities of the modern world. The problems of social, national and international reconstruction will not be solved without an appreciation of those deeper values of life which, the Gita shows, are the very structure of Reality. A new Indian nation, a new social order, a new civilisation must be built on the essential teachings of the Gita. The wisdom of the Gita is the hope of a new humanity Sadhu Vaswani, who was regarded by many as an "embodiment of the Gita", a "living Gita", and who was equally at home in the Eastern and Western traditions of thought, gives us in this book the teaching of the Gita in simple words. In the Bhagavad Gita, simplicity is combined with wisdom. The essential teaching of the Bhagavad Gita has been overlaid by controversies which scholars and theologians may understand but not lovers of the simple life. In the present volume, the author has simplified the message of the Bhagavad Gita and related it to the experience and aspirations of the common man. "To the vast majority of men", he says, "life seems to be a meaningless muddle. Not many seem to realise that life, at its noblest, is a yatra, a piligrimage to God: the Infinite is our true Home."

As our daily lives and corporate well-being become more dependent upon computers, system reliability grows increasingly important. No longer are frequent system outages acceptable. In many cases, failure intervals must now be measured in centuries. Even current fault-tolerant computing systems will fail once every five or ten years. This book is the first in a three-part series on active/active systems. It describes techniques that can be used today for extending system failure times from years to centuries, often at little or no additional cost. The techniques described include splitting a large system into smaller, cooperating independent nodes. Copies of the application's database are distributed across the nodes. It is shown that these techniques significantly reduce the number of system failure modes and increase the level of sparing. As a result, the loss of a single node's capacity occurs far less frequently than the loss of all capacity when the equivalent monolithic system fails. Furthermore, the loss of more than one node's worth of capacity is almost never. Central to these techniques is the requirement that all database copies that are distributed across the network must be kept in synchronism. Several methods available today for maintaining synchronism are described. They include asynchronous data replication, synchronous data replication, and network transactions.

Active/active architectures can extend failure times from years to centuries. Active/active systems comprise multiple independent nodes using a common distributed database cooperating in a common application. This book is the third volume of a three-part series on active/active systems. It gives real-life examples of existing active/active systems that are achieving such extraordinary failure intervals. As our daily lives and corporate well-being become more dependent upon computers, system reliability grows increasingly important. No longer are frequent system outages acceptable. Often, failure intervals must now be measured in centuries. In addition, the performance of these systems is analyzed; and a set of commercial off-the-shelf products are described that enable system implementations. There are many additional advantages of these multi-node architectures, such as unlimited scalability, load balancing, disaster tolerance, efficient use of all capacity, and risk-free failover testing. Also described are several other technologies related to high availability, such as the grid, virtual tape, and the Real Time Enterprise (RTE). There are many regulations being promulgated that require the use of high-availability computing. Many of these are summarized. Throughout this volume and the preceding two volumes, dozens of rules are formulated to achieve extreme availabilities. They are summarized here for handy reference.

"To err is human, to forgive divine," goes the familiar saying. If you have ever aspired to realize the divine within you, you need look no further - within the pages of this powerful book you will find the means to master The Magic of Forgiveness as Dada J.P. Vaswani describes it. What is forgiveness? Why should we forgive? How can forgiveness empower us, heal us, help us to bury the dead past and begin our lives anew? Answers to these and other burning questions are offered here. Dada J.P. Vaswani, whose knowledge of human nature is profound, but, at the same time, compassionate and non-judgemental, teaches us how to apologize with grace; how to forgive with generosity; how to restore damaged relationships; how to overcome resentment and bitterness; how to forgive ourselves when the need arises; and above all, how to forget after we have forgiven someone. It has been said, "We win by tenderness; we conquer by forgiveness." In this book, Dada J.P. Vaswani shows us how we may conquer ourselves - and the hearts of others - by The Magic of Forgiveness!

The race to build the first time machine.

In a world filled with dysfunction, futility, and confusion, people are looking for meaning and significance. They want to break through the barriers holding them back. BREAKING THE BARRIERS offers three foundational pillars to equip readers for overcoming the most difficult obstacles in their lives. These three pillars teach readers how to: -Take on the character of God the Father -Take on the wisdom of the Son -Take on the discipline of the Spirit. Through dynamic stories of people who have overcome seemingly insurmountable odds, and the powerful example of the author who has overcome great adversity in his own life, this book shows readers that God is on their side and desires for them to fulfill the dreams and purposes he has placed in their hearts.