Fault-tolerant workstations and replanning

When creating a new Symphony, you can configure IBM Z Workload Scheduler to automatically send the Symphony file to IBM Workload Scheduler after you modify the current plan.

To send the new Symphony file automatically, set the CPUAUTOLNK parameter of the CPUREC initialization statement to ON.

Otherwise, you can control manually when the Symphony file is delivered to the distributed agent, set the CPUAUTOLNK parameter to OFF. You can improve scheduling performance in these ways:
  • Reduce network congestion by controlling when the file is delivered
  • Keep jobs from being scheduled on a workstation
For the syntax and description of CPUAUTOLNK, see CPUREC.
When replanning, the distributed agent can receive and run the Symphony file and report job status back to IBM Z Workload Scheduler only if the workstation is active and linked. From the Modifying Work Stations in the Current Plan dialog, you can view and modify the status of the fault-tolerant agent. Select option 5.5 from the main menu to display the dialog:
Figure 1. EQQMWSLL - Modifying work stations in the current plan
 EQQMWSLL---------- MODIFYING WORK STATIONS IN THE CURRENT PLAN -----------------
                                                                                
 Enter the row command S to select a work station for modification, or          
 I to browse system information for the destination.                            
                                                                                
Row Work station                   L S T R Completed     Active Remaining      
 cmd name text                              oper  dur.    oper   oper  dur.     
 '   CPUA Workstation 1               A C A     0    0.00      0     1    0.08  
 '   CPUV Workstation 2               A C A     0    0.00      0     0    0.00  
 S   CPU2 Workstation 3             L A C A     0    0.00      0     0    0.00  
 '   PRT1 Printer pool                  P A     0    0.00      0     0    0.00  
 '   SETP Used to Prepare JCL           G S     0    0.00      0     0    0.00  
 '   STC1 Started task                O C A     1    0.00      0     0    0.00  
 '   VST                              A C S     0    0.00      0     0    0.00  
 '   WTO1 Messages                    A G C     0    0.00      0     0    0.00  
 ******************************* Bottom of data ********************************
In the S column, the possible values for status are the following:
A
Active. The workstation is running and scheduling its own plan.
O
Offline. The workstation is not running and scheduling its own plan.
In the L column, the possible values are the following:
L
Linked. Communication is established between IBM Z Workload Scheduler and the workstation.
U
Unlinked. There is not an established connection to send and exchange events.
Job status includes information such as job started, job run, and job completed. When the new plan is produced, the distributed agents are stopped, and the scheduling on the agents is interrupted. The scheduling is resumed only when the new Symphony file is delivered.
When you send the Symphony file (CPUAUTOLNK=OFF) manually, you must manually link the fault-tolerant agent. Perform the following steps:
  1. In the Modifying Work Stations in the Current Plan dialog (EQQMWSLL - Modifying work stations in the current plan), use the S row command to select the fault-tolerant agent.
  2. In the Modifying a Work Station in the Current Plan dialog that is shown next, enter the following command:
    Figure 2. EQQMWSTP - Modifying the status of a fault-tolerant workstation in the current plan
    EQQMWSTP ------- MODIFYING A WORK STATION IN THE CURRENT PLAN -----------------
    Command ===>                                                                   
                                                                                   
    Select one of the following command:                                           
     L LINK             To send command link work station                          
     U UNLINK           To send command unlink work station                        
     S START            To send command start work station                         
     P STOP             To send command stop work station                          
                                                                                   
    Work station          : FMAX        COMPUTER AUTOMATIC FTW                     
    Type                  : Computer    FT Work Station                            
    Status                : Active                                                 
    Status link           : Linked
    L
    To link the workstation
  3. The Modifying Work Station Status in the Current Plan dialog displays the change.