Using virtualization for high availability and disaster recovery

Authors:
T. Adeshiyan;C. R. Attanasio;E. M. Farr;R. E. Harper;D. Pelleg;C. Schulz;L. F. Spainhower;P. Ta-Shma;L. A. Tomek
Affiliations:
IBM Systems and Technology Group, Raleigh, NC;IBM Research Division, Thomas J. Watson Research Center, Yorktown Heights, NY;IBM Systems and Technology Group, Poughkeepsie, New York;IBM Research Division, Raleigh, North Carolina;IBM Research Division, Tel-Aviv, Israel;IBM Research Division, Thomas J. Watson Research Center, Hawthorne, New York;IBM Systems and Technology Group, Poughkeepsie, New York;IBM Research Division, Tel-Aviv, Israel;IBM Systems and Technology Group, Raleigh, North Carolina
Venue:
IBM Journal of Research and Development
Year:
2009

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Abstract

Traditional high-availability and disaster recovery solutions require proprietary hardware, complex configurations, applicationspecific 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 Xent-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.