Denver Health uses a mainframe application to track nearly every aspect of patient health care, from hospital records to billing information. Connections to the mainframe are routed over SNA (Systems Network Architecture) gateways in the data center. Most of the gateways were running on old, outdated hardware and were not able to support many concurrent connections. In addition, the network did not provide a sufficient degree of redundancy and failover for disaster recovery scenarios. By using Microsoft Virtual Server 2005, Denver Health consolidated the servers into virtual machines, maintaining and improving response time while building redundancy and failover capabilities into the network. Hardware costs were cut by $25,000 per year and network and SNA manageability was improved.
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