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Controlling resource usage in MainView SRM operator services

Because MainView SRM uses IBM z/OS enclaves, you can use z/OS Workload Manager (WLM) to assign performance goals for selected work that the SVOS address space performs.

Using WLM, you can assign a different service class to each enclave, which allows you to prioritize the work within the scope of the system.


MainView SRM enclaves start when the SVOS Started Task starts and stops when the Started Task stops. Therefore, only single-period velocity goals are appropriate.

Within the WLM definitions, you can create a new subsystem type of BMCS to assign service classes. The following table lists WLM process names that you can use to further delineate goals for various work that is performed in the SVOS Started Task. If no WLM definitions exist for the BMCS subsystem type, all work is assigned to the default service class (usually SYSSTC) for Started Tasks.

Note

Assigning an SVOS enclave to a discretionary goal or at a very low priority can cause the product to take longer when shutting down.

Process-name definitions in WLM

Process name

Description

SCAN

Controls the goals for VTOC Scan (VSCAN), Tape Scan (TSCAN), MCDS Scan (MSCAN), Catalog Scan (CSCAN), and BCDS Scan (BSCAN) processes

Note: The VTOC Scan process underlies all policy collection intervals. For pool policy collection intervals, any logging of data to the space collector database or automation performed on the collected data occurs outside of any enclave.

SPACECOL

Controls the goals for the SPSUM, DAILYSUM, and APPLMON commands

The actual logging of the data to the space collector database or automation performed on the collected data occurs outside of any enclave.

VIEWS

Controls the goals for all BBI3 view processing

All work that is associated with views, either from MVI or MVE displays, is performed under this enclave, with the following exceptions:

  • For views that initiate a real-time VTOC Scan to collect the data for the display, the actual VTOC Scan is performed under the SCAN enclave; the BBI3 view processing to display the data is performed under the VIEWS enclave.

  • For views that retrieve data from the MainView SRM HSM, space collector, or capacity planning database, data retrieval is performed outside of any enclave. The BBI3-related processing to display the data is performed under the VIEWS enclave.

Note

Use uppercase letters when defining process names in WLM.

To create the subsystem type

  1. From the WLM Definition Menu, select option 6 (Classification Rules).
  2. Create the subsystem type:
    1. In the Subsystem Type field, set the type to BMCS.
    2. In the Qualifier fields, specify one or more process names (described in Controlling resource usage in MainView SRM operator services), and include WLM qualifier (Type) code PC to further delineate the definition.

    The following example shows the WLM panel on which you define the rules:

    Example

    -------------------------------------------------------------------------- 
                    Create Rules for the Subsystem Type        Row 1 to 3 of 3
    Command ===> ___________________________________________ Scroll ===> CSR   
    Subsystem Type BMCS (Required)   Fold qualifier names?   Y (Y or N)     
    Description  . . . MV/SRM SVOS Tasks                                     
    Action codes:   A=After     C=Copy        M=Move     I=Insert rule        
                    B=Before    D=Delete row  R=Repeat   IS=Insert Sub-rule   
                                                                 More ===>    
              --------Qualifier--------               -------Class--------    
      Action  Type       Name     Start                Service     Report     
                                             DEFAULTS: STCNRM      STORMGMT    
      ____  1 PC         SCANS    ___                  STCNRM      ________    
      ____  1 PC         VIEWS    ___                  STCPAS      ________    
      ____  1 PC         SPACECOL ___                  STCHI       ________



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