1 December 1998 Geographically dispersed parallel sysplex architecture using optical wavelength division multiplexing
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Since its introduction in 1994, the Parallel Sysplex architecture for mainframe computer systems has attracted a great deal of interest because of its high performance, continuous availability, scalability, and lower cost of ownership. Recently, it has become possible to interconnect the building blocks of a Parallel Sysplex (host processor, coupling facility, sysplex timer, and disk storage) at extended distances using fiber optic data links. In particular, optical wavelength-division multiplexing (WDM) has been an enabling technology for the extension of this architecture to a geographically dispersed Parallel Sysplex (GDPS). We describe the use of WDM in GDPS configurations, including distance limitations and typical performance considerations. Experimental results of testing a GDPS with WDM channel extensions up to 40 km are presented, and some test results on the IBM 9729 Optical Wavelength Division Multiplexer used in these configurations are also discussed.
Casimer M. DeCusatis, W. Eric Hall, Frank Janniello, D. Petersen, "Geographically dispersed parallel sysplex architecture using optical wavelength division multiplexing," Optical Engineering 37(12), (1 December 1998). https://doi.org/10.1117/1.602035 . Submission:


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