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Breaking the Availability Barrier III - Active/Active Systems in Practice (Paperback)
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Breaking the Availability Barrier III - Active/Active Systems in Practice (Paperback)
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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.
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