Siemens V 4.0 Benutzerhandbuch
32
GINA V4.0 System Administrator Guide – September 2000
Setting up the database
To enable these aims to be achieved, knowledge is required on datasets and their dynamics
(static, low frequency of change, high rate of change), as well as the access behavior to the
data (navigating, value-based). This information is supplied to the Persistency Service gen-
erator as customizing[14] input in an optimization process. From this input, the Persistency
Service generator produces the optimized definition of the database schema (table layout,
indexing, constraints) and the access functions to database tables (see section 5.2 on page
33).
(static, low frequency of change, high rate of change), as well as the access behavior to the
data (navigating, value-based). This information is supplied to the Persistency Service gen-
erator as customizing[14] input in an optimization process. From this input, the Persistency
Service generator produces the optimized definition of the database schema (table layout,
indexing, constraints) and the access functions to database tables (see section 5.2 on page
33).
A further task of the database administrator is to configure the database server. Here, the
parameters for the operation of the database are defined in the appropriate configuration
files and runtime procedures (specific to the selected database system). These parameters
include maximum values such as
–
parameters for the operation of the database are defined in the appropriate configuration
files and runtime procedures (specific to the selected database system). These parameters
include maximum values such as
–
the number of transactions permitted in parallel
–
the wait time for a response from a remote database server
–
name spaces for the current session like
DBSERVERNAME
or
SERVERNUM
–
parameters that affect the execution of the session, e. g. the time interval between two
checkpoints.
checkpoints.
If the database and transaction monitor are linked via the XA interface, the information
required by the participating systems must be configured in appropriate generation and
start procedures.
required by the participating systems must be configured in appropriate generation and
start procedures.
The initialization of the database is particularly important. This includes the initialization of
tables from a file which contains the data in ASCII notation, or the transfer of binary-
encoded data as an excerpt from a secondary database of the same type. Migration tools
which are specific to the database system are available for transferring data from existing
databases or files.
tables from a file which contains the data in ASCII notation, or the transfer of binary-
encoded data as an excerpt from a secondary database of the same type. Migration tools
which are specific to the database system are available for transferring data from existing
databases or files.