FIRST EDITION: Hardback book, the cover shows some signs of rubbing and the corners show slight signs of bumping. Internally the book is clean, bright and tightly bound. It is illustrated with graphs, tables and flow charts. The book was published in 2006 by Springer, Berlin, the text is in English. The subtitle to the book is 'Concepts, Design, Implementation'. A fairly heavy book.
Companies and other organizations depend more than ever on the availability of their Information Technology, and most mission critical business processes are IT-based processes. Business continuity is the ability to do business under any circumstances and is an essential requirement modern companies are facing. High availability and disaster recovery are contributions of the IT to fulfil this requirement. And companies will be confronted with such demands to an even greater extent in the future, since their credit ratings will be lower without such precautions. Both, high availability and disaster recovery, are realized by redundant systems. Redundancy can and should be implemented on different abstraction levels: from the hardware, the operating system and middleware components up to the backup computing centre in case of a disaster. This book presents requirements, concepts, and realizations of redundant systems on all abstraction levels, and all given examples refer to UNIX and Linux systems.