Backups
Object storage for database backups: store dumps, not live database files
Object storage is a strong destination for database backup artifacts, but it is usually not where a database engine should place its live data files. The database needs to create a recoverable backup representation before the object layer can preserve it.
Create an application-consistent backup
Use the database’s supported dump, physical backup or snapshot process so transactions and metadata form a recoverable state. Copying active database files with a generic file uploader can capture an inconsistent mixture of writes.
For systems with transaction logs or point-in-time recovery, include the required log stream and catalogue information in the design.
Package objects around restore operations
Choose object names that identify database, backup type, timestamp and sequence without placing sensitive customer information in public-facing keys. Keep a manifest when a recovery point spans several objects.
Large physical backups can use multipart upload, while smaller logical dumps may fit one object. The object size should follow the backup tool and provider limits.
Encrypt sensitive data
Transport TLS protects the network path. If the database backup contains sensitive information, evaluate client-side or provider-supported at-rest encryption and protect the encryption keys separately.
Encryption is part of restore planning: an encrypted object without recoverable key material is durable data that cannot be used.
Apply retention at the backup layer
Coordinate database retention, S3 versioning and provider lifecycle rules so old backup sets are removed intentionally and complete recovery chains are not truncated.
A lifecycle rule that deletes a base backup while keeping dependent logs can leave apparently healthy storage that cannot perform point-in-time recovery.
Restore into a separate database
Periodically download a chosen recovery point and restore it to an isolated test instance. Run integrity checks or application-level queries after the restore.
This proves the full chain from database capture through object storage and back into a running database.