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Using virtualization for high availability and disaster recovery
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by T. Adeshiyan,
C. R. Attanasio,
E. M. Farr,
R. E. Harper,
D. Pelleg,
C. Schulz,
L. F. Spainhower,
P. Ta-Shma,
and L. A. Tomek
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Traditional high-availability and disaster recovery solutions
require proprietary hardware, complex configurations, application-specific
logic, highly skilled personnel, and a rigorous and lengthy
testing process. The resulting high costs have limited their adoption
to environments with the most critical applications. However, high
availability and disaster recovery are becoming increasingly
important in many environments that cannot bear the complexity
and the expense involved. In this paper, we show that virtualization
can be used to develop solutions that meet this market demand. We
describe the recently released Virtual Availability Manager
(VAM) product offering, which provides simplified availability
solutions using Xen®-based virtualization, and which is available as
part of the IBM Systems Director product. We present key design
principles of VAM, explain its architecture and current
capabilities, and describe the way it is being extended to enable
recovery in case of disaster.
 Full paper
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PDF
