Recovery in Parallel Database Systems

The relational DBMS technology is a success in the commercial market. This success has led to the use of DBMS technology in application environments requesting their traditional virtues, but at the same time, adding new requirements such as - very-high transaction rates, real-time transaction response and continuous availability. New multi-processor hardware architectures lay the foundation, making it possible to meet these requirements. This book presents a systematic analysis of the main recovery approaches for centralized DBMSs developed over the last two decades, in particular to how well they fulfil the requirements for availability and soft real-time response. The analysis relates specifically to approaches used in current commercial and research systems. The element in particular lacking in the current methods is the ability to on-line re-establish the fault tolerance level automatically and without blocking. A set of novel recovery methods for parallel DMBs based on multi-computer shared noting hardware is presented. The recovery methods are intended to support - continuously-available transaction services, very-high transaction loads and soft real-time transaction response.