Using SSM Global Application › How to Set Up SSMGA › Step 6: Add SSM Resource Table Columns

Step 6: Add SSM Resource Table Columns

SSMGA requires several new columns in SSM resource tables to support the functionality that SSMGA provides. Use REXX program OPSSM2CV to add the required SSMGA columns to SSM resource tables by specifying a parameter of SSMGA(Y).

Strictly local resources that cannot be moved to another system do not require any column changes. Defaults for non-existent columns are supplied for the LST and GST tables.

All system name values in SSMGA are in the form:

sysname.subsys

sysname

Specifies the real z/OS system name.

subsys

Specifies the OPS/MVS subsystem name on the system (usually OPSS).

Movable resources require the following new columns:

PRIMARY_SYSTEM  CHAR(14)      UPPER CASE DEFAULT('*.*')
SSM#CURSYS      CHAR(14)      UPPER_CASE DEFAULT('*.*')
SSM#DESSYS      CHAR(14)      UPPER CASE  DEFAULT('*.*')
SSM#MOVMOD      CHAR(8)       UPPER CASE  DEFAULT('INACTIVE')
SSM#SYSLST      VARCHAR(350)  UPPER CASE 
SSM#GRPLST      VARCHAR(350)  UPPER CASE
AUTOHOME        CHAR(1)       UPPER CASE  DEFAULT('N')

The following list describes the new columns:

• PRIMARY_SYSTEM

  Specifies the preferred system to run the resource and is also the constant cross-system prereq specification name for resources that use the movable resource as a prerequisite but do not have a local SSM replicated copy of the movable resource. Even when the movable resource is running on an alternate system, the primary system name is still the cross-system prerequisite name; that is, system.subsys.table.name.

• SSM#CURSYS

  Contains the current system that owns the resource.

• SSM#_DESSYS

  Specifies the system name to which the resource should be moved. Changing the desired system to an alternate system name on the current system copy of the resource causes the resource to stop on the current system and move to the alternate system.

• SSM#MOVMOD

  Controls how the current system is selected. A value other than INACTIVE indicates that the resource is movable from the primary system to any other system specified in the SSM#SYSLST column. The alternate systems are specified as word or comma delimited list. System names are in sysname.subsys format. The sequence of alternate system names in the list is an implied priority of alternate systems for automatic selection of an alternate system.

  SSMGA recognizes three special values for SSM#MOVMOD:

  • AUTO - Causes SSMGA to move a resource automatically to the next available system in the system list hierarchy when the recovery option is chosen for a detected movable resource owning system failure.
  • WAITSYS - Causes SSMGA to wait to assign ownership of a movable resource until the current desired system rejoins the SSMGA plex.
  • WAITPRI - Causes SSMGA to wait to assign ownership of a movable resource until the primary system joins the SSMGA plex.

  Any other value of move mode allows movement of resources by manually changing the desired system to an alternate system.

• SSM#SYSLST

  Lists all of the available alternate systems to which you can move data.

• SSM#GRPLST (Optional)

  Specifies SSM resources, such as a workload, global status, or disaster recovery eligibility, using arbitrary 1-18 character names. The ISPF monitoring tool uses the group names in SSMGA to move groups of resources and in the operator command facility for query and action commands. The list of group names is word or comma delimited. SSMGA monitors the resource group name list for changes

• AUTOHOME (Optional)

  Specifies the Yes/No value that determines if the resource can move back to its home system once this system becomes active.