IMS system administration considerations and tasks
These topics describe information and required steps for day-to-day operation of the IMS system.
z/OS interface considerations
These topics describe information and required steps that you must consider while installing IMS and IRLM on z/OS®.
VTAM interface considerations
If your IMS system requires VTAM®, the VTAM mode table must contain entries for all VTAM terminals defined to IMS.
CSL administration
The tasks associated with administering a CSL are typically performed by the system administrator or system operator.
CSL ODBM administration
The CSL Open Database Manager (ODBM) supports access to databases that are managed by IMS DB in DBCTL and DB/TM IMS systems in an IMSplex.
CSL OM administration
This topic describes the administrative tasks associated with OM.
CSL RM administration
The tasks associated with administering the Resource Manager (RM) are typically performed by the system administrator or system operator.
CSL SCI administration
This topic describes the administrative tasks associated with SCI.
CQS administration
This topic describes the system administration tasks associated with using the Common Queue Server.
IMSRSC repository administration
After performing system definition of the
IMSRSC repository
, you can use it for storing resource (and descriptor) definitions for IMS databases, transactions, programs, and routing codes.
IMS service considerations
Proper planning for implementing service to IMS is a vital part of keeping IMS available and resilient.
Planning for shared queues
This topic gives an overview of the concepts you should understand to use shared queues and then outlines the planning and administrative tasks associated with shared queues.
Data sharing in IMS environments
When more than one IMS system has concurrent access to an IMS database, those systems are sharing data, and you have a data-sharing environment. In a data-sharing environment, you manage multiple IMS systems, each running on different z/OS systems in a sysplex. Such configurations require more sophisticated operations and recovery procedures.
Planning for VTAM generic resource groups
This topic describes the planning and administration tasks associated with using VTAM generic resource groups.
Planning for Transaction Manager resources in an IMSplex
This topic describes in detail the functions of the resource structure and Resource Manager (RM) as they relate to managing IMS Transaction Manager resources in an IMSplex.
IMS security
This topic provides information to help you establish resource security for an IMS online system and identifies the resources that can be protected and the facilities available to protect them, provides design considerations, and describes the steps that you need to take to activate security.
Controlling IMS
Controlling IMS consists of many tasks.
Starting or restarting IMS
Starting or restarting an IMS subsystem means initializing the IMS control region.
Shutting down IMS
The command that is used to shut down the control region also forces termination of data communications and the dependent regions if they have not already been terminated in an orderly way, and can also tell the CQS subsystem to shut down.
Testing the system
As a system administrator, you must be involved in two phases of testing. One phase occurs when application programs are verified prior to a cut over to production mode. The second phase involves evaluating changes or corrections to existing application programs to ensure that application function has not regressed and to validate the new or changed function.
Collecting and interpreting IMS monitoring data
Monitoring is the collection and interpretation of IMS data. This data helps you understand the daily needs of the system and provides an insight into areas that might need changes.
Modifying the system design
This topic summarizes the planning activities needed when changes are necessary in the IMS system design.
Tuning the system
You can make changes to parameters that allow the IMS online system to execute more efficiently.
Enabling and disabling IMS functions
If an IMS function is not enabled by default, you can enable the function dynamically while IMS is running by issuing the
UPDATE IMSFUNC
command. Or, you can enable the function statically by defining the function as enabled in the DFSDF
xxx
member of the IMS PROCLIB data set, and then cold starting IMS.
Making online changes
IMS provides several different options for making changes to resources in an online IMS system.
Printing output with IMS Spool API
This topic provides design and operational advice for the use of the IMS DL⁄I Spool application programming interface (API) and provides details for using the IMS Spool API to increase the access of IMS application programs to advanced printing capabilities.
Accessing external systems from within IMS
IMS application programs can access external systems to use data that resides in those external system or to interact with business logic that resides outside of the IMS environment.
Parent topic:
System administration