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Migrating to the Solaris™ Operating System: The Discipline of UNIX-to-UNIX® Migrations by David Levy, Brian Down, Ken Pepple

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Examining Strategies

In the following sections, we examine the various strategies available for a migration effort, including the following:

  • Refronting

  • Replacement

  • Rehosting—technology porting

  • Rearchitecting—reverse engineering

  • Interoperation

  • Retirement

When planning a migration project, consider how your environment could benefit from the strategies described in this section.

Refronting

Many legacy applications have excellent functionality but are not user friendly. Data entry for the application is accomplished by means of a series of screens that frequently contain cryptic names for fields and unintuitive menus, which result from limited screen space. These interfaces were based on CRT technology that was available 20 to 30 years ago.

Rather than ...

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