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Defines how persistent data is stored, backed up, and restored in production environments.

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Volume layout

ServiceDefault path
TiKV/data
PD/data
Kafka/var/lib/kafka/data
Redis/data
MongoDB/data/db
All persistent volumes should be backed by SSD or NVMe storage for production deployments.

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Backup strategy

  • TiDB: daily backups to secure, off-cluster storage
  • Kafka: weekly segment-level backups
  • Redis: RDB snapshots every 6 hours (cache data is non-authoritative)
  • Backup validation: monthly restore and integrity verification tests

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Disaster recovery

  • Validate full restore procedures at least once per quarter
  • Maintain a minimum of three geographically isolated backup copies
  • Run staged disaster recovery simulations such as warm-standby restoration and full cluster rehydration from backups