Technical data

Virtual Partitions (vPars) Management on nPartitions
Fault-Tolerant vPar Configurations for nPartitions
HP System Partitions Guide: Administration for nPartitions, rev 5.1 458
Fault-Tolerant vPar Configurations for nPartitions
You should consider the following recommendation if you intend to
establish Virtual Partition configurations that are tolerant of failures,
such as hardware self-test failures, or nPartition configuration changes,
such as removing a cell from an nPartition.
NOTE The guidelines in this section only apply to Virtual Partitions that are
configured in multiple-cell HP Superdome nPartitions.
These guidelines are not for single-cell nPartitions or for systems other
than HP Superdome servers.
Configuration Guidelines for Fault-Tolerant Virtual Partitions
To configure vPars in an nPartition so that the vPars still can load/boot
HP-UX when not all expected hardware is active or available, use the
info in the following list.
• Fault-Tolerant vPar Processor (cpu) Configuration
To plan and create fault-tolerant vPar processor configurations you
need to know how many processors are available for use in an
nPartition.
The number of processors available for vPar use is the number of
configured processors on active cells in the nPartition.
Guidelines for vPar processor fault tolerance:
❏ The number of vPar bound processors and the min number of
vPar processors should anticipate that one or more cells or
processors might remain inactive or be deconfigured.
The total of all min processor attributes for all vPars within an
nPartition should no more than:
(active_cells - 1) * (processors_per_cell)
where active_cells is the number of currently active cells, and
processors_per_cell is the average number of configured
processors on each cell.