Unlike wired networks where transmitters have no effect on receivers other than their own, in wireless networks we are limited by interference. The traditional routing methods are not optimal any more when it comes to a wireless medium. The maximum data rate on each link depends not only on the power in that link but also on the transmitted...

This book is a complete...

THE INFORMATIONAL DELUGE shows no signs of abating. We are inundated with data from the TV, from the Internet, and from advertisements stuffed in our mail boxes, virtual and otherwise. Unfortunately, as the quantity of information increased, its quality declined dramatically: Books were replaced by journals; then magazines; then newspapers;...

OpenAM is an open source continuation of the OpenSSO project that was taken over, and later scrapped, by Oracle. OpenAM is the only commercial-grade, feature-rich web application that provides SSO solutions. It has a variety of features and a powerful Single Sign-On (SSO) capability, but the implementation can be tricky, and the unorganized...

Over the last two years, Google’s Android operating system (OS) has gone from a virtually unknown open source solution to the current mobile OS market leader among all mobile handsets, with over one-third of the market share, and it’s still climbing rapidly. Android has even started to dominate the tablet OS marketplace, and...

I have worked since May 2006 as a principal technical support engineer in the Bugs Verification Group of the MySQL Support Group for MySQL AB, then Sun, and finally Oracle. During my daily job, I often see users who are stuck with a problem and have no idea what to do next. Well-verified methods exist to find the cause of the problem...

In the last 15 years, some of us have witnessed mail becoming e-mail, grocery stores becoming www.store, and step-by-step technology becoming part of our daily life. Technology development has radically changed the enterprise's way of doing business. First, daily tasks such as sales, client, and vendor management became...

Good system administrators recognize problems long before anyone asks, "Hey, is the Internet down?" Nagios, an open source system and network monitoring tool, has emerged as the most popular solution for sys admins in organizations of all sizes. It's robust but also complex, and Nagios: System and Network Monitoring, 2nd...

The second section will show you how you can build content-driven portals with...

In the first edition of this book, we focused on what we called the "High Availability Database Administrator." However, that term led G to the question of just what is meant by High Availability? As a term bandied about among database administrators, this can have different meanings depending on who is interpreting it, who has to...