The servers with two terabytes of disk storage support all the Safeway superstores, regional distribution centers, the Hayes head office and the Presto stores. We simply cannot have that. Availability and security are high on the list of Mr. Winch's concerns. Two locations give you that security. Availability is important because of the huge volumes involved.
Workload balancing between the two computer sites is an important consideration.
Data is shared between the two sites so there is no danger of one being overwhelmed by demand while the other is under used. Parallel Sysplex architecture enables many servers to act as one and allows parallel execution without changing application code. Transactions reaching the Sysplex are routed to free processor resource for immediate execution. Through datasharing 32 DB2 subsystems can be managed as one. Parallel Sysplex servers work together to provide a single image to users, continuous availability enhanced security and the ability to manage many as one.