z/OS JES2 Introduction
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JES2 configurations

z/OS JES2 Introduction
SA32-0994-00

The size and complexity of your data processing configuration is based on your business needs. Many factors contribute to your configuration requirements, including the following variables:
  • Number of concurrent interactive users
  • Size of your data bases
  • Number of customers
  • Geographic location of users and resources
  • Number of users that run jobs, access data bases, and use programs
  • Total number of jobs.

JES2 provides two distinct facilities for the expansion of your JES2 processing configuration: remote job entry and network job entry. Remote job entry allows for the extension of your local processing configuration by defining remote locations that can consist of job input terminals and output devices at a different physical site connected to the z/OS®-JES2 processor through telecommunication links such as telephone lines and satellites. In this manner, a z/OS-JES2 system can provide input and output support across various geographic locations. But all the remote sites and their attached devices are defined to a single z/OS-JES2 configuration. Network job entry takes this concept further by allowing individual z/OS–JES2 processors, that are geographically dispersed, to be connected in a network of JES2 and non-JES2 systems that can communicate, pass jobs, and route output to any attached output devices.

JES2 allows you to take advantage of the power of z/OS in:
  • A single-system complex (one processor and one JES2)
  • A multiple-system complex (up to 32 processors, each with its own JES2)
  • A poly-JES configuration (more than one JES2 operating concurrently within a single z/OS)
  • Remote job entry (RJE) workstations (remotely attached to a processor in the configuration)
  • A network job entry complex (the linking of two or more single-system or multi-system configurations).

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