BigAdmin: Logical Domains (LDoms)

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Logical Domains (LDoms)

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LDoms (Logical Domains)

last updated on 2009-09-11

The BigAdmin LDoms (Logical Domains) hub is a resource for System Administrators to get information pertaining to the LDoms technology in Solaris.

Sun Microsystems' Logical Domains, or LDoms, technology is part of a suite of methodologies for consolidation and resource management that includes Sun Fire Dynamic System Domains and Solaris OS Containers, of which resource control and operating system virtualization are a subset. This technology allows you, the user, to allocate a system's various resources, such as memory, CPUs, and devices, into logical groupings and create multiple, discrete systems, each with their own operating system, resources, and identity within a single computer system.

We Guarantee That Your Applications Will Work
If your applications were qualified to run on the Solaris 10 OS, Sun guarantees that they will run on Logical Domains. You don't need to requalify them. For more information, see Solaris 10 Binary Application Guarantee Program. See also LDoms on the HCL.

LDoms is built into every CoolThreads system, so you do not need to purchase it separately. With the LDoms partitioning technology you can:

Create virtual machines each with their own sub-set of resources
Protect & Isolate using hardware + firmware combination

Logical Domains Manager

One manager per machine controls hypervisor and all its ldoms
Exposes CLI to administrator
Maps Logical Domains to physical resources

LDoms Technology

Each domain is a full virtual machine with a reconfigurable subset of machine resources and its own independent OS
Protection and isolation via SPARC hardware and LDoms Hypervisor firmware
Each virtual machine appears as independent machine
Own kernel, patches, tuning parameters
Own user accounts, administrators
Own disks
Own network interfaces, MAC & IP addresses
Start, stop and reboot independently
Service domains for I/O