Modifying and controlling system resources

You establish the initial settings of IMS resources as part of the IMS system definition process. The MTO, and other operators authorized to do so, can change various system resources using IMS commands.

You can modify and control the operating state of the following IMS system resources using type-1 commands:

• Dependent regions
• Telecommunication lines
• Terminals
• Transactions
• Databases
• ISC users (subpools)
• ETO users
• MSC resources
• Security options
• Conversations
• Subsystems

You can use many IMS commands to perform similar control functions for different types of resources.

The resources are:

• Telecommunication line, physical terminal, or node resources
• Logical terminal resources
• Logical link resources
• Logical link path resources
• Transaction resources
• Transaction class
• Program resources
• Database resources
• Subsystem resources

The IMS Version 15.2 Operations and Automation show the relationship between these commands and resources, and provide answers to a series of specific questions. For example, after a command is issued, can a resource:

• Receive input?
• Send output?
• Perform output message queuing?

You can also modify and control IMS resources using type-2 commands in:

• Single-IMS IMSplexes that are configured with a minimal Common Service Layer that include an Operations Manager (OM) and a Structured Call Interface (SCI), but no Resource Manager (RM). This configuration is also known as an enhanced command environment.
• Multiple-IMS IMSplexes that are configured with a full CSL (OM, SCI, and RM).

Related reading:

• For details about the system definition processes (batch and dynamic) and details about configuring a single IMS with a minimal CSL, see IMS Version 15.2 System Definition.
• For details about the IMS commands, see IMS Version 15.2 Commands, Volume 1: IMS Commands A-M and IMS Version 15.2 Commands, Volume 2: IMS Commands N-V.