CICSplex definitions - CPLEXDEF

The CICSplex definition (CPLEXDEF) views display information about the CICSplexes associated with the local CMAS.

Supplied views

To access from the main menu, click:

Administration views > CMAS configuration administration views > CICSplex definitions

Table 1. Views in the supplied CICSplex definitions (CPLEXDEF) view set
View Notes
CICSplex definitions

EYUSTARTCPLEXDEF.ASSIGN

 Add a CMAS to a CICSplex definition in the data repository.
CICSplex definitions

EYUSTARTCPLEXDEF.CREATE

 Create a CICSplex definition and add it to the data repository.
CICSplex definitions

EYUSTARTCPLEXDEF.DETAILED

 Detailed information about a selected CICSplex definition.
CICSplex definitions

EYUSTARTCPLEXDEF.REMOVE

 Remove a CICSplex definition from the data repository.
CICSplex definitions

EYUSTARTCPLEXDEF.TABULAR

 Tabular information about all CICSplex definitions associated with the CMAS identified as the context.
CICSplex definitions

EYUSTARTCPLEXDEF.UNASSIGN

 Remove a selected CMAS from a CICSplex definition with or without the FORCE option.

Actions

Table 2. Actions available for CPLEXDEF views
Action Description
ASSIGN Add a CMAS to a CICSplex definition in the data repository.
CREATE Create a CICSplex definition and add it to the data repository.
REMOVE Remove a CICSplex definition from the data repository.
UNASSIGN Remove a selected CMAS from a CICSplex definition with or without the FORCE option.
UPDATE Update a CICSplex definition in the data repository.

Fields

Table 3. Fields in CPLEXDEF views
Field Attribute name Description
RS server bottom tier BOTRSUPD For sysplex optimized workloads, this value is converted from a task load percentage to an actual task count. That count will be used to define the bottom tier task load range (from zero up to this value).

The value range is from 1 to 25. When a region's task load falls within this range, then the task load will be broadcast to the coupling facility for every change in the task load. Once the load reaches this value, then the RS server update frequency task rules will be activated.

The default value is 1%. You should only change this value after giving consideration to the impact that the change may have on your workload and coupling facility throughput.

The value shown here at the CICSplex level may be overridden at the CICS definition level to allow fine tuning of the value on an individual CICS region basis.

Last modification agent CHANGEAGENT The change agent identifier that made the last modification.
  • DREPAPI - Resource was last changed by a CICSPlex SM API command.
  • DREPBATCH - Changed by a CICSPlex SM utility.
  • N_A - Resource was created or last updated prior to CICS TS Version 4 Release 1 and support for resource signatures.
Last modification agent release CHANGEAGREL The CICS release level of the agent that made the last modification.
Last modification CHANGETIME The local date and time when the definition was last changed.
Last modification user ID CHANGEUSRID The user ID that made the last modification.
CICSplex name CICSPLEX The 1- to 8-character name for the CICSplex. The name can contain alphabetic, numeric, or national characters. However, the first character must be alphabetic.
Time created CREATETIME The local time when the definition was created.
Daylight saving time DAYLGHTSV Indicates whether or not the specified time zone is currently recognizing daylight saving time. The value for this field is stored for documentation purposes, but it is not used in time zone calculations.
Description DESC A description of the CICSplex.

Input Values: 1- to 58-character description

Description code page DESCCODEPAGE The code page of the description field.
Monitor interval (minutes) INTVL The number of minutes in the range 15-1440 after which counters holding monitoring data are reset to zero. The default is 480.

The value used must be evenly divisible into 1440. For example, 60, 120, 240, and so on. If the value entered is in the valid range, but is not evenly divisible into 1440, the number will be rounded up to the next legitimate value.

RS server read interval READRS Within a workload running in optimized mode, this value specifies the minimum interval between refreshes of a target region status from a CICS CFDT server. These refresh requests will be issued by a routing region that is evaluating a target region for a dynamic routing request.

The value range is from 0 to 2000, and represents units of milliseconds:

  • A value of 0 means that a routing region will request a status update of a target region on every occasion that it examines that target region's status.
  • Values between 1 and 2000 specify the minimum time interval that must expire before the status of a target region can be refreshed.

A low interval value means that the CFDT server will be polled more often for a status update, than for a higher value. For workloads in QUEUE mode, this will result in a task load more evenly balanced across the CICS regions in the workload target scope (assuming all other health and link factors are equal) . However, the utilization of the RS server will be correspondingly increased, which may consequently result in a higher utilization of your coupling facility.

A value of 1000 represents a one second interval. The default value is 200 milliseconds

The value specified here at the CICSplex level may be overridden at the CICS definition level to allow fine tuning of the value on an individual CICS region basis.

Resource status facility population RODMPOP Indicates whether the CICSplex is to be identified to and monitored by the resource status facility.
RS server pool name RSPOOLID For sysplex optimized workloads, region status data is maintained within a coupling facility data table. That table will be contained within a CFDT pool identified by this attribute. For an optimized workload to activate, there must be an active Region Status server which manages data for the pool name specified here.

If your CICSplex identifiers are not unique within your sysplex, you must ensure that the RS server pool names are unique. If your Sysplex comprises unique CICSplex identifiers, then they may all specify the same RS server pool name.

The default name is DFHRSTAT. You may choose to employ an existing CFDT pool for containing your CICSplex data tables. If you do, be aware that the throughput of your optimized workloads may be impeded by any user application activity to the specified pool name. Likewise, any application throughput to the pool may be impacted by sysplex optimized workloads. It is recommended that a discrete RS server and poolname is defined for the optimized workload function.

Note: All routers and targets active in the CICSplex when this value is changed will be forced out of the optimized state until they are restarted. If the RSPOOLID is changed by mistake, changing it back to its original value will cause all routers and targets to resume their optimization state.

Security checking exemption SECBYPASS Indicates whether CICSPlex SM is to check specific user IDs for exemption from CICS command and resource checking.

Input Values: YES | NO

Simulated CICS-command security checking SECCMDCHK Indicates whether CICSPlex SM security is used to simulate CICS command checking for the CICS systems associated with the CICSplex.

Input Values: YES | NO

Simulated CICS-resource security checking SECRESCHK Indicates whether CICSPlex SM security is used to simulate CICS resource checking for the CICS systems associated with the CICSplex.

Input Values: YES | NO

State of CICSplex STATE The state of the CICSplex:
  • Active
    • The CICSplex is active.
  • Pending
    • The CICSplex is to be removed when bindings to all member CMASs have been removed.
  • Recreated
    • The CICSplex is being re-created.
Status of attempt to delete CICSplex STATUS Status (deprecated).
Time zone TMEZONE A code identifying the time zone that is associated with this CICSplex.
Time zone offset TMEZONEO A number of minutes, between 0 and 59, that are to be added to the specified time zone. This adjustment is used to resolve time references in areas that do not use a standard zone.
RS server top tier TOPRSUPD For sysplex optimized workloads, this value is converted from a task load percentage to an actual task count. That count will be subtracted from the MAXTASK value for the region to determine top tier task load range.

The value range is from 1 to 25. The value is applied as an arithmetic percentage to a region's MAXTASKS setting. The resultant task count value is subtracted from the region's MAXTASKS setting to establish a task load top tier. If the task load in a region runs up to its MAXTASKS limit, then the task load must drop back below this value before the MAXTASKS state for the region is switched off and broadcast to the coupling facility.

The default value is 5%. You should only change this value after giving consideration to the impact that the change may have on your workload and coupling facility throughput.

The value shown here at the CICSplex level may be overridden at the CICS definition level to allow fine tuning of the value on an individual CICS region basis.

RS server update frequency UPDATERS Within a workload running in optimized mode, this value specifies the frequency with which the CICS CFDT (RS) server will be called to modify the value of the task load with a target CICS region. This value will be the default frequency value for all CICS regions within the current CICSplex definition.

The value range is from 0 to 25:

  • A value of 0 means that the RS server is not notified of any task load count changes, which disables the optimized workload function for regions within the scope of this CICSplex.
  • Values between 1 and 25 are applied as an arithmetic percentage to a region's MAXTASKS setting. The resultant task count value is used as a numeric threshold to drive an update call to the RS server.

For example, with a MAXTASKS setting of 120, and with this attribute set to 20, the RS server will be called to update the WLM load count when the regions task count changes between:

  • 23 and 24 tasks - (20%),
  • 47 and 48 tasks - (40%),
  • 71 and 72 tasks - (60%),
  • 95 and 96 tasks - (80%),
  • 119 and 120 tasks - (100%).

The RS server would be updated when a regions task load increments or decrements across these boundaries.

If you specify a value that is at the lower end of the 1-25 scale, then that will cause an increase in the frequency of updates to the RS server across its task load range. For workloads in QUEUE mode, this will result in a task load more evenly balanced across the CICS regions in the workload target scope (assuming all other health and link factors are equal) . However, the utilization of the RS server will be correspondingly increased, which may consequently result in a higher utilization of your coupling facility.

The value specified here at the CICSplex level may be overridden at the CICS definition level to allow fine tuning of the value on an individual CICS region basis.