HP 3000 Manuals HP 3000 Manuals
Planning
Good planning includes selecting the appropriate hardware and software,
and gathering the necessary directory information.
Hardware
Select the appropriate hardware to be used for SPU Switchover/XL:
* Determine which two 900 Series HP 3000 computer systems will serve
as home and alternate systems for each other.
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NOTE These two SPUs must be comparable in both performance and
configuration limitations. If they are not, the alternate
system's performance could degrade when the switchover
occurs.
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* Determine which nonsystem volume sets will be switchable between
the SPUs.
* Ensure that the fiber link drives to be configured as switchable
volume sets are connected to each SPU on their own fiber link
cards.
Software
Select which application programs you want to make available with
SPU Switchover/XL:
* Determine which application programs and data require high
availability.
* Ensure that the application programs and data reside on one of the
switchable volume sets.
NOTE The switchable volume sets are already initialized with the VOLUTIL
utility on the home system. SPU Switchover/XL configuration is
done through SYSGEN.
Directories
Select the appropriate directories to be used for SPU Switchover/XL:
* Determine the switchable volume accounting information that must
be duplicated on both system volume sets.
NOTE Changes made to the directory on one system are not automatically
made on the other system.
Configuration Requirements
Following are the configurations reqired for SPU Switchover/XL:
* Configuration must be done from the system where all switchable
volume sets are currently mounted, with the exception of the
ASYSTEM command. The ASYSTEM command names the system from which
you execute the command; therefore, the ASYSTEM command must be
executed on both the home and alternate systems.
* Both the home system and alternate systems must be up and running
during the configuration.
* During configuration, all volume sets to be configured must be
mounted in the MASTER or MEMBER state on the system where the
configuration is being done. The system where the configuration
is being done must be booted first. This allows the system to
take control of all switchable volume sets. The system where the
configuration is being done must have control of all the
switchable volume sets during configuration.
* Every nonsystem volume set that is configured as switchable, must
be assigned a home system. The home system is the system where
work will normally be done on the volume set. When configuration
is complete, the volume set will reside on its home system except
during a reconfiguration or after a switchover has occurred.