The SAP DB database can be installed and run on a computer in one mode (database instance) or several modes (database instances) (
Database Instance Type, see also: SAP DB Versions and Database Instance Types).Each database instance consists of
threads, main memory structures (caches) and disk-based storage of the data on devspaces.
The following disk-based
devspaces are available in every database instance for the physical storage of data:Each database instance differentiates between the following areas for the logical storage of data: