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7-22 AlphaServer GS80/160/320 User's Guide
7.6 Soft Partitioning
Soft partitioning allows you to run multiple instances of an OpenVMS
operating system on one hardware system. Soft partitions are created
by setting environment variables that define the number of partitions,
as well as the CPU modules, I/O risers, memory size, and size of shared
memory. Also, one partition is assigned to receive error interrupts.
See the OpenVMS Alpha Galaxy Guide and GS80/160/320 Firmware
Reference Manual for more information.
About Soft Partitioning
• Only the OpenVMS operating system supports soft partitioning.
• Each partition is maintained by the system management console.
• Each soft partition must have at least one CPU module, one memory
module, an I/O riser module, and a PCI box with a standard I/O module.
• Each soft partition requires a standard I/O module with resident SRM
firmware in order to boot an operating system copy (or instance).
• Two I/O risers in a QBB cannot be split between partitions.
• CPU and memory resources can be shared across partitions; I/O is bound to
a particular partition.
You define what resources are allocated to each partition by setting SRM
environment variables. Table 7–5 lists the environment variables used to create
soft partitions. After you have assigned the environment variable values, issue
the lpinit command to initialize the partitions defined.