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Secondary Storage

Camunda 8 supports two secondary storage backends: Elasticsearch/OpenSearch (ES/OS) and relational databases (RDBMS). This section documents how to work with, operate, and extend the secondary storage layer.

Guides​

  • Working with Secondary Storage — performance checklist, schema field-type guidance, query best practices, and common pitfalls covering ES/OS and RDBMS.
  • Archiving — how completed data is moved from active to dated archive indices in ES/OS.
  • Backup and Restore — snapshot strategy for ES/OS deployments and RDBMS backup guidance.

RDBMS​

The RDBMS subsection covers the relational database module: architecture, developer guide, benchmarking, and architectural decision records.