Chapter 2 Setting Up XSCF 2-95
TABLE 2-19 Domain Configuration Terms
Term Description
Domain When hardware resources in the server are logically divided into one or more units, each
set of divided resources can be used as one system, which is called a domain. A Solaris OS
can operate in each domain.
PSB The PSB is made up of physical components, and can include 1 CMU (CPU/Memory
Board unit) and 1 IOU (I/O unit) or just 1 CMU. In the M4000/M5000 servers, the CMU
is mounted on the MBU. A PSB can also be used as to describe a physical unit for
addition/deletion/exchange of hardware. The PSB can be used in one of two methods,
one complete unit (undivided status) or divided into four subunits. However, in the
M3000 server, the PSB can be used in one complete unit (undivided status) only.
Note - On the M4000/M5000 servers, 1 PSB is 1 CMU. In an M4000 server, a PSB makes
up the entire MBU. In an M5000 server, there are two PSBs on the single Motherboard unit
(one PSB contains CPUs 0 to 3 and the other PSB contains CPUs 4 to 7).
In the M3000 server, a PSB makes up the entire MBU. There is only one PSB, which
contains CPU, I/O, and memory. The PSB cannot be divided into four subunits.
XSB The XSB is made of physical components. In the XSB, the PSB can be either one complete
unit (undivided status) or divided into four subunits. The XSB is a unit used for domain
construction and identification, and can be also used as a logical unit.
LSB A logical unit name assigned to an XSB. Each domain has its own set of LSB assignments.
LSB numbers are used to control how resources such as kernel memory get allocated
within domains.
System board The hardware resources of a PSB or an XSB. A system board is used to describe the
hardware resources for operations such as domain construction and use. In this manual,
the system board refers to the XSB.
Uni-XSB One of the division types for a PSB to be configured. Uni-XSB is a name for when a PSB is
logically only one unit (undivided status). It is a default value setting for the division type
for a PSB. The division type can be changed by using the XSCF command, setupfru(8).
Uni-XSB may be used to describe a PSB division type or status.
Quad-XSB (Note 3) One of the division types for a PSB to be configured. Quad-XSB is a name for when a PSB
is logically divided into four parts. The division type can be changed by using the XSCF
command, setupfru(8). Quad-XSB may be used to describe a PSB division type or status.
Hardware resource Hardware components contained on a system board that configures a domain.
Domain
Configuration
Divides hardware resources in this system into independent software-based units.
Partitioning is performed with XSCF as follows:
1. XSBs are defined with each consisting of a CMU or MBU and an I/O unit divided by
software. (In M4000/M5000 servers, there will be I/O on only half of the XSBs.)
2. Each XSB is handled as an LSB so that it can configure a domain and be assigned a
number (LSB number). Furthermore, XSCF can define LSB resources in detail.
3. The domain operates with the LSB resources and the LSB number.
Domain ID (DID) ID assigned to a domain.
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