Confluence Server to Cloud Migration Strategy

Atlassian has significantly improved the Confluence Server to Cloud migration path by releasing the Confluence Migration Assistant. This involved addressing challenges with product divergence, large file sizes, bad data, and inflexibility. The solution developed a server plugin for incremental data migration, enabling users to select data, create migration plans, and trigger migrations from their server instance. The system coordinates exports, uploads to the Atlassian Media Platform, and initiates imports. To handle scalability and reliability, a distributed queue-based system was implemented for managing migration steps across multiple nodes, with controlled concurrency for different step types. Further optimization focused on handling attachments independently to address large file sizes.