HP 3000 Manuals

SPU Switchover/XL User's Guide

Configuring SPU Pairs 

After naming the systems, you need to establish them as a switchover pair
in which one is the home system and the other is the alternate system.


NOTE  SPU pairs can be added or deleted only from the home (configuring)
      system.  When the configuration is activated with the SPUCONTROL
      SETUP CI command, the configurations are duplicated on the
      alternate system.


Adding an SPU Pair 

The APAIR command enables you to add a system pair to the SPU
Switchover/XL environment.  To add a pair of SPUs to the configuration
file, ensure that you are logged on as manager.sys, and perform the
following from the home (configuring) system:

   1.  Enter the SYSGEN utility:

            : SYSGEN Return 

   2.  Enter the SPU facility within SYSGEN:

            sysgen> SPU Return 

   3.  From the SPU facility use the APAIR command to identify the home
       system (Alpha) and the alternate system (Beta) to the
       configuration:

            spu> APAIR HOME=ALPHA ALT=BETA Return 

   4.  If you want the two systems to be alternates for each other, you
       must reenter the command, reversing the sequence, identifying the
       home system (Beta) and the alternate system (Alpha) to the
       configuration:

            spu> APAIR HOME=BETA ALT=ALPHA Return 

       Entering both commands adds two equal system pairs, enabling them
       to serve as alternates for each other.

   5.  Enter the following to retain the entries in the configuration
       file:

            spu> HOLD Return 
            spu> E Return 
            sysgen> KEEP Return 
            Keeping to group CONFIG.SYS
            Purge old configuration (yes/no)? Y Return 
            ** Configuration files successfully saved **
            sysgen> E Return 

Deleting an SPU Pair 

The DPAIR command enables you to delete a system pair from the SPU
Switchover/XL environment.  To delete a pair of SPUs from the
configuration file, perform the following from the home (configuring)
system:

   1.  Enter the SYSGEN utility:

            : SYSGEN Return 

   2.  Enter the SPU facility within SYSGEN:

            sysgen> SPU Return 

   3.  From the SPU facility use the DPAIR command to delete the
       alternate system (Beta) from the home system (Alpha):

            spu> DPAIR HOME=ALPHA ALT=BETA Return 

   4.  If the two systems are alternates for each other, you must enter
       the command again, reversing the sequence, to identify the home
       system (Beta) and the alternate system (Alpha) for deletion from
       the configuration:

            spu> DPAIR HOME=BETA ALT=ALPHA Return 

   5.  Enter the following to retain the entries in the configuration
       file:

            spu> HOLD Return 
            spu> E Return 
            sysgen> KEEP Return 
            Keeping to group CONFIG.SYS
            Purge old configuration (yes/no)? Y Return 
            ** Configuration files successfully saved **
            sysgen> E Return 

The system displays the following message if you did not previously use
the APAIR command to add the system pair to the configuration:

     ** Error ** System pair not in configuration

MPE/iX 5.0 Documentation