The image admin067.gif illustrates a typical RAC architecture and how the Scheduler works with it. It shows the following elements:End of image description.
A database, which contains a Job Table
Instance 1, Instance 2, and Instance 3
Job Coordinator 1, which controls three job slaves
Job Coordinator 2, which controls three job slaves
Job Coordinator 3, which controls three job slaves
Nine job slaves
Also, the following relationships apply:
Job Coordinators 1, 2, and 3 each control three slaves
Instance 1 works with Job Coordinator 1
Instance 2 which works with Job Coordinator 2
Instance 3, which works with Job Coordinator 3
The three Job Coordinators exchange information among themselves
End of image description.