Mainframe Replatforming or Rehosting is the conversion or porting of mainframe applications to a new environment. The mainframe applications continue to run with few changes on a new platform. The most common platforms which legacy mainframe applications are migrated to are UNIX and Wintel environments.
The decision to migrate off of the mainframe isn’t an easy one. The project can be complex and very involved. However, more and more companies are migrating their legacy applications off of the mainframe.
The two biggest reasons that organizations decide to replatform their mainframe environments are:
Retiring Personnel: Systems support personnel are becoming scarce as more and more mainframe experts retire. Organizations are now faced with the risk of not having enough skilled staff to maintain their current mainframe systems. Companies are modernizing their mainframe applications in order to avoid the risk of being unsupported.
Cost Reduction: The continued need to reduce cost and increase efficiency makes replatforming a compelling option. Companies are seeing a 40%-90% decrease in their mainframe operational costs when they migrate. This is due primarily to a reduction in hardware and software license costs. Cost reduction is in the forefront of the decision to rehost mainframe applications.