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IBM Power 595 Technical Overview and Introduction
Table 3-6 Configurable memory-to-default logical memory block size
In most cases, the actual requirements and recommendations are between 256 MB and
512 MB. Physical memory is assigned to partitions in increments of the logical memory block
(LMB).
The POWER Hypervisor provides support for the following types of virtual I/O adapters:
Virtual SCSI
Virtual Ethernet
Virtual (TTY) console
Virtual SCSI and virtual Ethernet are discussed later in this section.
Virtual (TTY) console
Each partition must have access to a system console. Tasks such as operating system
installation, network setup, and some problem analysis activities require access to a system
console. The POWER Hypervisor provides the virtual console using a virtual TTY or serial
adapter and a set of Hypervisor calls to operate on them. Virtual TTY is a standard feature of
the 595 server and hardware management console
3.5 Logical partitioning
Logical partitions (LPARs) provide a level of virtualization which provides a level of abstraction
between the physical processors and the operating system. Implementing LPARs can help
you increase utilization of system resources and add a new level of configuration possibilities.
This section provides details and configuration specifications about the various logical
apportioning technologies available for the 595 server.
Detailed information about logical partition definitions and configuration can be found in
PowerVM Virtualization on IBM System p: Introduction and Configuration, Fourth Edition
,
SG24-7940, which is on the IBM Redbooks Web site is located at:
http://www.ibm.com/redbooks
Configurable memory
Default logical memory block
Less than 4 GB
16 MB
Greater than 4 GB up to 8 GB
32 MB
Greater than 8 GB up to 16 GB
64 MB
Greater than 16 GB up to 32 GB
128 MB
Greater than 32 GB
256 MB
Note:
The terms processor, cpu, and core are used interchangeably in this document.
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