  The VEPP-4 control system was designed almost 20 years ago as CAMAC-based
distributed control system. Today the main peculiarity of the upgraded VEPP-4
control system is the employment of obsolete CAMAC-embedded 24-bit Odrenok
computers in the middle (process) level. The communication software is
developed to provide an effective interaction between user (operator)
applications on the high level and executive programs in the middle level. The
communication software is Linux-based and includes the Application Server and
Device Servers. The Application Server provides channel and database access for
user applications. The Device Servers provide interaction with the hardware.
The backend database server is based on PostgreSQL. This paper describes the
structure of the VEPP-4 control system database and data/channel access
procedures.
