The SPARC SuperCluster T4-4 is set up with logical domains (LDoms), which provide users with the flexibility to create different specialized virtual systems within a single hardware platform.
Each SPARC T4-4 server is configured with at least one logical domain. When domains are created on the SPARC SuperCluster T4-4, the following configurations are set for each domain:
Percentage of CPU resources allocated to the domain – Set between 25% and 100% at installation for each domain, depending on the type of domain configuration. It may be possible to change the percentage of CPU resources allocated to the domain after installation, depending on the type of domain configuration. However, you will have to reboot the SPARC T4-4 server after you have reallocated the CPU resources for the changes to take affect.
Percentage of memory resources allocated to the domain – Set between 25% and 100% at installation for each domain, depending on the type of domain configuration. It may be possible to change the percentage of memory resources allocated to the domain after installation, depending on the type of domain configuration. However, you will have to reboot the SPARC T4-4 server after you have reallocated the memory resources for the changes to take affect.
Number of PCI root complexes allocated to the domain – Set from one to four PCI root complexes allocated to each domain, depending on the type of domain configuration. The number of PCI root complexes allocated to each domain cannot be changed after the initial installation.
LDom configurations supported on the SPARC SuperCluster T4-4 have the following characteristics:
From one to four LDoms on each SPARC T4-4 server in the SPARC SuperCluster T4-4
Each LDom can be one of the following three types:
Database Domain
Application Domain running Oracle Solaris 10
Application Domain running Oracle Solaris 11
In order to fully understand the different configuration options that are available for the SPARC SuperCluster T4-4, you must first understand the basic concepts for the express module slots and the different networks that are used for the system.