Optimizing Cloud Migration: Performance Lessons for the Enterprise

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Phase 2: Beginning Your Journey to the Cloud When starting a migration to become a cloud-focused organization, there are four rules of good practice: 1. Start small and gradually migrate systems 2. Test, test, test—prove everything before committing to the move 3. Understand your performance expectations 4. Build a comprehensive monitoring solution These rules apply equally when thinking only about Internet perfor‐ mance. 1. Start Small and Gradually Migrate Systems Any rollout to the cloud should be completed as a gradual transi‐ tion, moving the lower-risk or biggest-win areas first while having systems that communicate back to your on-premise solution. Typically, legacy applications and data migration are the highest-risk areas, so the aim should be to create cloud-based services that miti‐ gate their risks. For example, the first phase may be to create an API in the cloud that provides access to data from an on-premise data‐ base—cloud-based data caching services can be used to deliver data returned from the API. Typically, this could be targeted at a specific region to evaluate the Internet performance. You can then gradually extend that cloud-based data provision until it eventually ends up not needing to communicate back to the source database at all. It is 11

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