Because you typically want to perform a backup and restore with zero system downtime with Couchbase Server it is impossible to create a complete in-time backup and snapshot of the entire cluster. In production, Couchbase Server will constantly receive requests and updated data; therefore it is impossible to take an accurate snapshot of all possible information. This would be the case for any other database in production mode.

Instead, you can perform full backups, and incremental backups, and merge these two together in order to create a time-specific backup; nonetheless your information may still not be 100% complete.