Sun Microsystems iPlanet Integration Server 3.0, Process System Manual

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Managing an Engine Database
124 iPlanet Integration Server • Process System Guide • August 2001
For more details on recovery levels, see the iIS Process Development Guide and the
iIS Process Client Programming Guide.
Shutting Down Engine Components
You can shut down an individual component by clicking the Shutdown button in
the component status display of the Engine Status window, or you can shut down
all running engine components by clicking the Shutdown command in the engine
status display.
Managing an Engine Database
The iIS engine database consists of three categories of tables:
Current State These tables maintain state information about all objects created in
process execution so that the engine state can be recovered in case of engine failure.
The tables contain current state information on all sessions, process instances,
activities, process attributes, timers, and so on.
Registration
These tables maintain state information about all library
distributions and aliases (see “About Aliases” on page 143 ) registered with the
engine. This information can be recovered in case of engine failure.
History Log These tables maintain historical information about the most
important objects created in process execution (sessions, process instances,
activities, timers, attributes, and attribute locks). This information can be used in
managing process execution, analyzing historical trends, and reporting on business
throughput. The log also includes information about engine startup, alarms, and
registration that can be used for troubleshooting purposes.
Database Management Issues
There are a number of management issues to consider regarding your iIS engine
database. These issues include growth of the database, failure of the database, and
recovering your data. Each is discussed below.