FUJITSU T5140 - Manual (Page 92)

70 SPARC Enterprise T5140 and T5240 Servers Administration Guide • February 2008
A logical domain is a discrete logical grouping with its own operating system,
resources, and identity within a single computer system. Applications software can
run in logical domains. Each logical domain can be created, destroyed, reconfigured,
and rebooted independently. There are several roles that logical domains can
perform as shown in the following table.
Logical Domain Configurations
The Logical Domain configurations are stored on the service processor (SP). Using
Logical Domains Manager CLI commands, you can add a configuration, specify a
configuration to be used, and list the configurations on the service processor. You
can also use the ILOM set /HOST/bootmode config=configfile command to specify
an LDoms boot configuration. For further information about /HOST/bootmode, see
your server’s ILOM supplement.
Logical Domains Software Requirements
The following software is required or recommended for Logical Domains on SPARC
Enterprise T5140 or T5240 servers:
TABLE 4-1 Logical Domain Roles
Domain Role Description
Control domain Domain in which the Logical Domains Manager runs, enabling you to
create and manage other logical domains and allocate virtual resources to
other domains. There can be only one control domain per server. The
initial domain created when installing Logical Domains software is a
control domain and is named primary.
Service domain Domain that provides virtual device services to other domains, such as a
virtual switch, a virtual console concentrator, and a virtual disk server.
I/O domain Domain that has direct ownership of and direct access to physical I/O
devices, such as a network card in a PCI Express controller. Shares the
devices to other domains in the form of virtual devices. You can have a
maximum of two I/O domains, one of which also must be the control
domain.
Guest domain Domain that is managed by the control domain and uses services from
the I/O and service domains.