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 after the example table.

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.

Follow these steps:

1. Issue the command S TESTTASK2.

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

2. Next, issue the command S TESTTASK1 and verify that TESTTASK1 starts first, and then TESTTASK2 starts.
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 stops TESTTASK2 first, then TESTTASK1.

Step 6 (Test the SSM Operation) completes when you have tested the SSMSTART and SSMSTOP rules and the following SSM operations successfully:

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