JES2

JES2 accepts the submission of work for the BCP. Major JES2 functions and design features include:

• The interpretation of job control language (JCL) statements
• The disposition of output
• A single-system image
• The ability to run multiple copies of JES2 (poly-JES)
• JES2 WLM for Sysplex

JES2 differs from JES3 in two main processing areas:

• JES2 exercises independent control over its job processing functions. JES3 exercises centralized control. Each JES2 processor in a multi-processor environment controls its own job input, job scheduling, and job output processing.
• JES3 does pre-execution of job setup. JES2 does not do this.