Glossary - HP Integrity rx7620 Configuration

Glossary

Term
Assigned and unassigned cells
Active and inactive cells
Cell compatibility rules
Online cell addition
Online cell deletion
Online cell migration
Physical cell insertion
Physical cell removal
Online cell replacement
Definition
Each cell in a server complex either is assigned to one of the nPartitions
in the complex, or it is unassigned and thus is not used by any of the
nPartitions. If an I/O chassis is attached to an unassigned cell, then the
chassis likewise is not assigned to an nPartition.
Cells that are unassigned are considered to be available resources; they
are free to be assigned to any of the existing nPartitions, or can be used
to create new nPartitions.
Cells that are assigned to an nPartition and have booted to form an
nPartition are active cells whose resources (processors, memory, and
any attached I/O) can be actively used by software running in the
nPartition.
Cells that are inactive either are not assigned to an nPartition, or they
have not participated in partition rendezvous to form an nPartition with
any other cells assigned to the nPartition. (Partition rendezvous is the
point during the nPartition boot process when all available cells in an
nPartition join together to establish which cells are active for the current
boot of the nPartition.)
While cells of different types can be freely mixed within a system
complex, only compatible cells can be included in the same nPartition.
The exact compatibility rules vary with the server model, but generally
the compatibility rules restrict partitions to contain cells using the same
processor type. The cell compatibility rules apply whether the
nPartition is configured statically or through Dynamic nPartitions
operations.
An unassigned cell can be added to a partition (with the parmodify
command) and immediately online activated (with the parolrad
command). The combination of these two steps is called online cell
addition.
A floating cell can be deactivated from a partition (with the parolrad
command) and then immediately unassigned from the partition (with
the parmodify command). The combination of these two steps is called
online cell deletion.
Online cell migration refers to the online deletion of a cell from one
partition and its online addition to another partition.
Physical cell insertion refers to the insertion of a cell board into a
previously vacant cell slot in a server complex. The inserted cell
becomes unassigned. None of the partitions in the complex are
affected by this operation.
Physical cell removal refers to the removal of an inactive (and
unpowered) cell board from a server complex. None of the partitions
in the complex are affected by this operation.
Replacement of a cell board by the sequence of operations: online cell
deletion, physical cell removal, physical cell insertion of a new cell into
the same slot, followed by online cell addition.
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