Create the database for schedulers

 

Before you begin

Each scheduler requires a database in which to store its persistent information. The choice of database and location should be determined by the application developer and server administrator.

Schedulers use this database for storing tasks and then running them. Scheduler performance is ultimately limited by database performance. If we need more tasks per second, one can run the scheduler daemons on larger systems, use clusters for the session beans used by the tasks or partition the tasks by using multiple schedulers. Eventually, however, the scheduler database becomes saturated, and a larger or better-tuned database system is needed. For detailed information on scheduler topologies see the technical paper, "WebSphere Enterprise Scheduler planning and administration guide".

Multiple schedulers can share a database when you specify unique table prefix values in each scheduler configuration. This sharing can lower the cost of administering scheduler databases.

 

Overview

Complete the following steps to create scheduler databases.

 

Procedure

1. Create a database. To create the database for a scheduler or to determine if an existing database is adequate for a scheduler, review the topic, "Create scheduler databases".

2. Create the scheduler tables. There are three methods for creating the tables for a scheduler:

   1. Create tables for schedulers using the administrative console. Use the administrative console to add, delete and verify database tables through your Web browser. This method is ideal for developers and simple scheduler topologies.

   2. Create tables for schedulers using JMX or scripting.

      Use JMX to add, delete and verify database tables programmatically with Java or scripting. This method is ideal for automating scheduler configurations for simple scheduler topologies.

   3. Create tables for schedulers using DDL files. Manually edit the DDL files through your favorite text editor, and verify that mapping between the table names and the scheduler resources and data sources is correct.

 

See also

Creating scheduler databases
Scheduler table management functions
Scheduler table definition
Creating scheduler tables using the administrative console
Creating scheduler tables using scripting and Java Management Extensions
Creating scheduler tables using DDL files

 

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