The ClustRa Telecom Database: High Availability, High Throughput, and Real-Time Response
Svein-Olaf Hvasshovd, Øystein Torbjørnsen, Svein Erik Bratsberg, Per Holager · 1995
New telecommunication services and mo-bility networks have introduced databases in telecommunication networks. Compared with traditional use of databases, telecom databases must fulfill very tough requirements on response time, throughput, and availabil-ity. ClustRa is a telecom database prototype developed to run on standard workstations in-terconnected by an ATM switch. To meet the throughput and real-time response require-ments, ClustRa is a main memory database with neighbor main, memory logging. Trans-actions are executed in parallel. To meet the availability requirements, we use a 2-safe repli-cation scheme over two sites with independent failure modes, a novel declustering strategy, early detection of failures with fast takeover, and by on-line self-repair and maintenance. This paper gives an overview of ClustRa and includes a set of performance measurements. 1