The WebSphere Extended Deployment Compute Grid component provides ways of managing the scheduling and execution control of background activities in a grid computing environment.
The various ways that you can manage your Compute Grid environment include using the job management console (JMC), analyzing job logs, specifying job classes, and by using classification rules.
A job log is a file that contains a detailed record of the execution details of a job. It is comprised of both system and application messages. Job logs are stored on the endpoints where the job runs and on the application server that hosts the job scheduler.
Job logs are viewable through the JMC and from the command line.
A job class establishes a policy for resource consumption by a set of grid jobs. Through this policy, execution time, number of concurrent jobs, job log and job output queue storage may be controlled. Each job is assigned to a job class. A default job class is provided for jobs that do not specify a class.
Classification rules are saved in a configuration file named gridclassrules.xml under the configuration directory of WebSphere Application Server. In WebSphere Extended Deployment V6.1, there is one gridclassrules.xml per cell, and the rules are ordered based on the priority element.