Five Ways to Migrate Applications to the Cloud - Slide 3

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Refactor: Run applications on a cloud provider’s infrastructure.

The primary advantage of refactoring is blending familiarity with innovation, as “backward-compatible” PaaS means developers can reuse languages, frameworks, and containers they have invested in, thus leveraging code the organization considers strategic. Disadvantages include missing capabilities, transitive risk, and framework lock-in. At this early stage in the PaaS market, some of the capabilities developers depend on with existing platforms can be missing from PaaS offerings.

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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