Logical domains (LDoms) is the paravirtualization technology from Oracle Sun. An LDom provides a separate virtualized operating system environment and a virtualized CPU that are created within a Solaris operating system instance. Each LDom uses an independent kernel. Each LDom contains a dedicated, virtualized operating system, and a virtualized CPU. You can start, stop, and restart the operating system that runs inside an LDom. Each LDom functions as a full virtual machine with a subset of hardware resources that you can configure as required. You can run your applications on the LDoms.

The physical server in your data center on which the LDoms are created is known as LDom Server. Individual Guest LDoms that are created on an LDom Server can have several different roles, which are based on the context and usage of the LDoms.

The following are the four major types of roles of the LDoms:

The LDom Agentlet that is installed along with the VRTSsfmh package on a Solaris traditional host lets Veritas InfoScale Operations Manager Management Server discover the LDom Server and Guest LDoms that are configured on the LDom server.