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Mainframe Migration Case Studies: A Total Cost of Ownership Comparison
As Open Systems grew in scale, reliability and popularity throughout the 1990s IBM and other vendors of proprietary mainframe solutions braced for the assault on their dominance of the corporate datacenter. Mainframe vendors developed innovative partitioning strategies and software and hardware pricing practices to compete with the less expensive RISC and Intel based platforms. The combination of these defensive strategies and the explosive growth in computing requirements in the late 1990s and 2000s were so successful that they actually contributed to a significant growth in mainframe installations during this time. IBM even cheerfully adopted the T-Rex as the mascot for its mainframe business in proud defiance to speculation on the extinction of the mainframe platform.
Despite the best efforts of mainframe vendors, though, the platform remains much less flexible and more expensive than open systems alternatives. Although mainframes have not gone extinct overnight as some anticipated in the early 1990s, organizations are continually reviewing their options, and replacing these platforms one by one. As the scalability and reliability of open systems increases to rival that of mainframe systems the pace of mainframe migrations has started to accelerate in recent years.
This paper examines two representative case studies to investigate the economic factors for migrating application work loads off of mainframe platforms in favor of open systems alternatives. The first case is based on a manufacturing company which retired its mainframe system by re-hosting an SAP implementation onto an Itanium based HP Integrity solution running Windows Server 2003. The second case examines the advantages of downsizing a mainframe installation by reviewing a financial services company, which moved several computationally intensive applications to a mixed environment of HP Integrity and HP ProLiant servers running Red Hat Linux.
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Despite the best efforts of mainframe vendors, though, the platform remains much less flexible and more expensive than open systems alternatives. Although mainframes have not gone extinct overnight as some anticipated in the early 1990s, organizations are continually reviewing their options, and replacing these platforms one by one. As the scalability and reliability of open systems increases to rival that of mainframe systems the pace of mainframe migrations has started to accelerate in recent years.
This paper examines two representative case studies to investigate the economic factors for migrating application work loads off of mainframe platforms in favor of open systems alternatives. The first case is based on a manufacturing company which retired its mainframe system by re-hosting an SAP implementation onto an Itanium based HP Integrity solution running Windows Server 2003. The second case examines the advantages of downsizing a mainframe installation by reviewing a financial services company, which moved several computationally intensive applications to a mixed environment of HP Integrity and HP ProLiant servers running Red Hat Linux.
Read More/Try It
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