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Cloud migration is the process of moving data, applications, and other business elements from an organisation’s on-site computers to the cloud or moving them from one cloud environment to another. This can involve migrating from physical servers or data centres to cloud-based infrastructure provided by services like Amazon AWS, Microsoft Azure, or Google Cloud Platform.
Here’s a breakdown of key aspects of cloud migration:
Types of Cloud Migrations:
Lift and Shift (Rehosting): This involves moving applications and data to the cloud without modification. It’s the fastest method but may not fully leverage cloud efficiencies.
Refactoring / Replatforming: Adjusting applications to better suit the new cloud environment, which can involve minimal to moderate changes to the codebase to improve scalability and performance in the cloud.
Rebuilding/Rearchitecting: Completely redesigning an application specifically for the cloud to optimise its performance, scalability, and utilisation of cloud-native features.
Reasons for Migration:
Cost Efficiency: Reducing costs associated with physical hardware maintenance, upgrades, and energy consumption.
Scalability: Easier scaling of resources to accommodate peaks in demand.
Performance Improvement: Enhanced performance capabilities through state-of-the-art technology upgrades that cloud providers regularly implement.
Business Agility: Increased flexibility to adapt to market changes and quicker deployment of new applications or services.
Disaster Recovery and Backup: Improved data backup, recovery, and duplication options to enhance data security and integrity.
Challenges:
Technical Complexity: Managing the complexity of moving existing applications and data securely and efficiently.
Security Concerns: Ensuring data is protected and compliant with regulations during and after the migration.
Downtime Management: Minimising downtime during the migration to avoid business disruptions.
Cost Management: Predicting and controlling costs related to the migration and ongoing expenses in a cloud environment.
Steps in Cloud Migration:
Assessment: Evaluating the existing infrastructure and workloads to identify what needs migration and any necessary changes.
Planning: Creating a detailed migration strategy that outlines the approach, timeline, costs, and potential risks.
Testing: Implementing security measures and compliance checks, followed by trial runs to ensure functionality and performance.
Migration Execution: Actual moving of data and applications to the cloud environment.
Optimisation: Post-migration review and adjustments to optimise resource use and cost.
Cloud migration is a strategic move that can significantly impact operational flexibility and business scalability. Proper planning, choosing the right migration type, and addressing potential challenges are critical for a successful transition.
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