Resilience and disaster recovery

Resilience and disaster recovery depend on deployment tier — see the deployment options comparison.

Desktop	No built-in resilience — a single local process using local file storage
Professional	Backup and restore
Enterprise	High availability across multiple zones, plus backup and restore

Because trac’s data model already preserves a full history of every model and dataset (see Virtualised deployment), day-to-day mistakes don’t require restoring from backup. Backups exist to cover disaster events and infrastructure failure: metadata is backed up using standard database backup processes, and primary data is backed up separately to an external archive.