Streamlined multi-tenant application development with tenant isolation mode in AWS Lambda

This article announces AWS Lambda's new tenant isolation mode, which enables strict isolation of execution environments for individual tenants within a single Lambda function.

• Tenant isolation mode processes invocations in separate execution environments per tenant
• Eliminates need for separate Lambda functions per tenant or custom isolation logic
• Tenant ID accessible via context object in function code
• Cached data, global variables, and /tmp files isolated per tenant
• Same-tenant invocations still benefit from warm environment reuse
• Charged when Lambda creates new tenant-aware execution environments
• Available in all commercial AWS Regions except Asia Pacific (New Zealand), GovCloud, China
• Can only be enabled during function creation, not modified afterward

Tenant isolation mode simplifies multi-tenant SaaS application development by automating tenant isolation without operational overhead of managing dedicated functions per tenant.