Relational databases
Relational database (RDBMS) support is a core capability of the Orchestration Cluster in Camunda 8 Self-Managed.
RDBMS is a standard secondary storage option for Orchestration Cluster installations, alongside Elasticsearch and OpenSearch.
With RDBMS secondary storage, data is exported to your relational database, and the Orchestration Cluster reads from it.
In this context:
- Primary storage is the broker-managed store for workflow execution state management.
- Secondary storage is an external store used for indexing, querying, analytics, and retention.
For a deeper conceptual comparison, see understanding primary vs secondary storage.
Start here
- New to RDBMS in Camunda: End-to-end RDBMS setup guide
- Need supported versions and compatibility details: RDBMS version support policy
- Need application-level settings and behavior: RDBMS configuration overview
Deployment guides
- Helm deployments: Configure RDBMS in Helm
- Manual deployments: Configure RDBMS for manual installation