Achieving 99.99% Availability: Atlassian’s Success with OpenSearch for Mission-Critical Workloads

Atlassian successfully migrated to OpenSearch to overcome scaling limitations with their legacy PostgreSQL-based search, enabling them to support growing AI demands. This Kubernetes-native platform now powers over 2 million monthly AI users and manages 20 billion+ documents across 300+ clusters with 99.99% availability. The move also resulted in a 45% reduction in developer pull request cycle time thanks to AI tools built on top of OpenSearch, like Rovo and RovoDev CLI.