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AVEVA Enterprise SCADA High Performance Database (HPDB) API Reference

High Performance Database (HPDB) and HPDB Set classes

High Performance Database (HPDB) and HPDB Set classes

The High Performance Database (HPDB) (OASySDNA.RealTime.HighPerformanceDB) and the HPDB Set (OASySDNA.RealTime.HighPerformanceSetDB) classes expose functionality for the underlying set layer (direct memory access) and the Virtual Access Layer (VDB) (overridable behaviour) within the RealTime database (RTDB). It is important to understand the intention of your application and whether you want to read\write data at a lower level to the database (that is, direct memory access) or whether you require the behavior from the VDB (for example, field validation, virtual fields). Although mixing and matching the classes within these two namespaces is possible, it is not recommended.

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