Amazon OpenSearch Serverless introduces collection groups to optimize cost for multi-tenant workloads

This article announces the general availability of collection groups for Amazon OpenSearch Serverless, a feature designed to optimize costs for multi-tenant workloads while maintaining security boundaries.

• Collection groups enable resource sharing across collections with different encryption keys
• Reduces multi-tenant infrastructure costs by up to 90% for smaller tenant workloads
• Provides logical security boundaries with physical isolation between groups
• Supports flexible network access combining public and VPC endpoints
• Minimum OCUs guarantee baseline performance; maximum OCUs control costs
• Collections within groups must be the same type (search, time series, or vector)
• Available in all AWS regions where OpenSearch Serverless operates at no additional charge
• Detailed CloudWatch metrics help optimize resource allocation and performance

Collection groups transform multi-tenant deployments by balancing security, isolation, and cost efficiency through flexible resource pooling and granular capacity controls.