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The journey from high availability and disaster recovery to business continuity solutions
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by T. Lumpp,
J. Schneider,
J. Holtz,
M. Mueller,
N. Lenz,
A. Biazetti,
and D. Petersen
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We first provide an overview of the current state-of-the-art architectures for continuous availability, briefly covering such traditional concepts as high-availability (HA) clustering on distributed platforms and on the mainframe. We explain how HA can be achieved in environments based on Sun Microsystems J2EE™, which differ from the classical clustering approach. We explain how disaster recovery (DR) has become an extension to HA. The second part of the paper discusses the aspects of service management, including the use and orchestration of process-based (ITIL®) systems management tasks within DR scenarios. Ensuring the right level of redundancy in the integration and service-oriented management of heterogeneous information technology landscapes becomes the key challenge.
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