Deployment and understanding of LDOMS (Logical Domains):
Ldom technology allows us to allocate a system’s various resources such as memory, CPUs and devices (I/O,Networl interfaces etc) into logical groupings and create multiple, discrete systems each having their own operating system, resources, and identity within a single computer system.
Ex: In General Server Techonoly, an OS is directly interacting with hardware through defined system procedure calls and uses complete hardawre resources. But in LDOM the concept is bit different, a new layer between Hardware and OS has been introduced which is called “HYPERVISOR”. It interacts as a medium between Hardware & OS and hence present the hardware components as defined by users to OS. In this case the resource allocation/representation is be done by HYPERVISOR and hence individual OS can have well defined hardware resources. Also remember in LDOM the allocated devices/resources are called VDEV’s (Virtual Devices).
Note: Ldom techology only supported on T-series servers, sparc-4v architecture with Solaris-10 only.