Using System State Manager › How to Use the Full Capabilities of SSM › Step 6: Test the SSM Operation › Test Prerequisite Checking

Test Prerequisite Checking

To test whether SSM checks prerequisites (if any are defined) for your started tasks, follow a procedure like the one described below.

Suppose that your STCTBL table contains rows defining these tasks:

TESTTASK1 has no prerequisites but is itself a prerequisite for TESTTASK2, so TESTTASK1 must be active before TESTTASK2 can start.

To verify this

1. Issue the command S TESTTASK2.

   The desired state for TESTTASK2 will change to UP, and the MISSING_PREREQ column value will change to TESTTASK1, indicating that TESTTASK2 cannot start until this prerequisite is satisfied.

2. Next, issue the command S TESTTASK1 and verify that first TESTTASK1 and then TESTTASK2 start.
3. After both tasks become active, issue the command P TESTTASK1 to stop the first task.

   The desired state for TESTTASK1 changes to DOWN and the MISSING_PREREQ value for the task changes to TESTTASK2, indicating that SSM cannot stop TESTTASK1 until the task that requires it. TESTTASK2 is also stopped.

4. Issue the command P TESTTASK2 now.

   SSM will stop TESTTASK2 first, then TESTTASK1.

Step 6 is complete when you have successfully tested the SSMSTART and SSMSTOP rules and the following SSM operations:

• Starting and stopping of started tasks
• Ability to keep a resource in its desired state
• Prerequisite checking