This database stores historical data (e.g. temperature history) and alarm and log data. The data is managed on the disk and is available again after a restart.
Depending on the configuration, up to 30,000 trend curves per PDBS can be processed. The PDBS can also run on different instances, analogous to the DMS, so that several 100,000 trend curves can be recorded simultaneously without any problems.
Reorganisation and debugging functions are available. The historical data is backed up once a day (can also be a network drive).
The database can also be accessed via web services (JSON/REST).