Network Database - Toshiba TOSDIC-CIE DS Manual

3. Database Management

Network Database

The network database resides in the hard disks of the SVR-DS and OIS-DS saved with different
setup information. In the network database, data can be written and read for each item in the table.
The SVR-DS can be accessed from the SVR-DS and OIS-DS.
The network database of the SVR-DS is saved with system setup information common to the
OIS-DS and SVR-DS, such as historical tag setup information and internal tag information. The
SVR-DS contains system data files to save system information and application data files to save
application data. Data is equalized in the network databases of all the SVR-DS units.
22
OIS-DS
Operator
Window
‚
•
SVR-DS
S erver P rocess,
U ser Applications
ƒ
SVR Database
Database Equalization
•
The operator window is read from any SVR database.
‚
The operator window is written in the SVR databases of all nodes.
ƒ
The server process, user applications, etc. are read from the SVR database
of own node.
„
The server process, user applications, etc. are written in the SVR databases
of all nodes.
...
Missing data while the server is failing is synchronized by starting the
synchronizing process "Database Equalize" when the server is started up.
Figure 3.7 Equalization of Network Databases of SVR-DS
SVR-DS
„ „
SVR Database
...
Database Equalization
‚
...