Five Ways to Migrate Applications to the Cloud - Slide 4

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Revise: Modify or extend the existing code base to support legacy modernization requirements, then use rehost or refactor options to deploy to cloud.

The revising option allows organizations to optimize the application to leverage the cloud characteristics of providers' infrastructure. The downside is that kicking off a (possibly major) development project will require upfront expenses to mobilize a development team. Depending on the scale of the revision, revise is the option likely to take the most time to deliver its capabilities.

Organizations seeking to move applications into the cloud have five options: rehost on infrastructure-as-a-service (IaaS), refactor for platform-as-a-service (PaaS), revise for IaaS or PaaS, rebuild on PaaS, or replace with software-as-a-service (SaaS), according to Gartner, Inc.

“When the CIO issues the simple directive ‘Move some applications to the cloud,’ architects face bewildering choices about how to do this, and their decision must consider an organization’s requirements, evaluation criteria, and architecture principles,” said Richard Watson, research director at Gartner. “However, no alternative offers a silver bullet: All require architects to understand application migration from multiple perspectives and criteria, such as IT staff skills, the value of existing investments, and application architecture.”

This slideshow highlights the alternative migration strategies Gartner suggests IT organizations consider.

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