Filter
Top Products
6 Hardware Management Console (HMC) Case Configuration Study for LPAR Management
multi-threading. SMT is a feature supported only in AIX 5.3 and Linux at an
appropriate level.
Multiple operating system support: Logical partitioning allows a single server
to run multiple operating system images concurrently. On a POWER5 system
the following operating systems can be installed: AIX 5L™ Version 5.2 ML4 or
later, SUSE Linux Enterprise Server 9 Service Pack 2, Red Hat Enterprise
Linux ES 4 QU1, and i5/OS.
Additional memory allocation in a partitioned environment
Three memory regions are reserved for the physical memory allocation of a
partition:
Hypervisor
Translation control entry (TCE) tables
Partition page tables
At the beginning of a partition size planning, you have to consider that the
allocated amount of memory in these three regions is not usable for the physical
memory allocation of the partition.
Hypervisor and TCE
All POWER5 systems require the use of the hypervisor. The hypervisor supports
many advanced functions including shared processors, Virtual I/O (VIO),
high-speed communications between partitions using Virtual LAN or concurrent
maintenance. There are many variables that dictate how much hypervisor
memory you will need. It is not a fixed amount of memory as with POWER4
systems.
Also the amount of IO drawers and the different ways to use IO, such as shared
environment, affect the amount of memory the hypervisor uses.
Partition page tables
Partition page tables are set aside in additional memory in the hypervisor to
handle the partition’s memory addressing. The amount of memory the partition
page table reserve depends on the maximum value of the partition, and must be
considered in your partition size planning.
Note: The number of VIOs, the number of partitions, and the number of IO
drawers affect the hypervisor memory.
Note: The bigger the maximum value of a partition, the bigger the amount of
memory not usable for the physical memory allocation of the partition.