Limiting resources for users

The user administration can impose stipulations on user groups and user IDs in order to limit the use or prevent the misuse of the following resources:

• utilization of disk storage capacity on the pubsets

• utilization of server main memory

• utilization of server performance (CPU capacity).

User-related allocation of these resources is always performed at the command level with ADD-/MODIFY-USER.

The actual control and checking of the allocation of these resources with regard to the specified values is performed in the operating system (e.g. administration of task categories, control by PCS, management of job streams and job classes, etc.).

Analogous control for user groups is possible with SECOS.

Use of the system-global resources can be limited for user IDs by the commands shown in the following table.

Resources used		Command	Operands
Use of disk storage capacity on the pubsets	Public- Space	ADD-USER/ MODIFY-USER-ATTRIBUTES	PUBSET=..., PUBLIC-SPACE-LIMIT=..., PUBLIC-SPACE-EXCESS=..., FILE-NUMBER-LIMIT=...., JV-NUMBER-LIMIT=..., TEMP-FILE-SPACE=..., DMS-TUNING-RESOURCES=...
Use of server main memory	Address space	ADD-USER/ MODIFY-USER-ATTRIBUTES	ADDRESS-SPACE-LIMIT=...
	Main memory	ADD-USER/ MODIFY-USER-ATTRIBUTES	RESIDENT-PAGES=...
	Task (de-) activation	ADD-USER/ MODIFY-USER-ATTRIBUTES	ACCOUNT-ATTRIBUTES=  (MAX-ALLOWED-CATEGORY=...,  PRIVILEGE=NO / PARAMETERS   (INHIBIT- DEACTIVATION=...))
Use of server performance (CPU capacity)	CPU limit	ADD-USER/ MODIFY-USER-ATTRIBUTES	ACCOUNT-ATTRIBUTES= (CPU-  LIMIT=..., PRIVILEGE=NO/PAR-  (NO-CPU LIMIT=...))
	Allowed execution priority	ADD-USER/ MODIFY-USER-ATTRIBUTES	ACCOUNT-ATTRIBUTES=  (MAXIMUM-RUN-PRIORITY=...)
	Allowed task categories	ADD-USER/ MODIFY-USER-ATTRIBUTES	ACCOUNT-ATTRIBUTES=  (MAX-ALLOWED-CATEGORY=...)
	Scheduling right	ADD-USER/ MODIFY-USER-ATTRIBUTES	ACCOUNT-ATTRIBUTES=  (PRIVILEGE=NO/PARAMETERS-  (START- IMMEDIATE=...))
	Performance measures	ADD-USER/ MODIFY-USER-ATTRIBUTES	DMS-TUNING-RESOURCES=...