A single database that runs on a database instance.
Database host machine, may contain multiple databases.
Replication at the level of operations; describes the operation, the arguments and data (e.g., an
UPDATE is applied to row X setting column Y = Z).Replication of the on-disk data structures after an operation has been applied.
The customer’s database within a database instance that is being replicated. The source of truth for data for all copies of that database.
Log used by a database to log database operations. Used for recovery replay or replication.