3.5 Relocation domains A relocation domain defines a set of members of an SSI cluster among which Linux guests can be relocated. A relocation domain can be used to define a subset of members of an SSI cluster to which a particular Linux guest can be relocated. These domains can be defined for business or technical reasons. Business reasons for relocation domains might be that your cluster contains members for a test environment and members for the production environment and you want to ensure that Linux guests are not moved from the test to the production environment accidentally. Nevertheless, you can enforce an out-of-domain relocation with the VMRELOCATE command and the option "FORCE DOMAIN". See 3.6.1, "VMRELOCATE command" on page 31. Also, a Linux guest can be licensed to run on a specific number of processors. A domain can be defined to ensure that the Linux guest does not run on more processors than defined in its license. Technical reasons for relocation domains might be that only certain members of an SSI cluster support specific architectural features of a Linux guest. Therefore, a relocation of such a Linux guest is restricted to those members supporting those features. For example, only certain members have crypto features or only certain members support the Floating-point extensions facility. Nevertheless, in this case, you can enforce a relocation with the VMRELOCATE command and the "FORCE ARCHITECTURE" option, if needed. See 3.6.1, "VMRELOCATE command" on page 31. 3.5.1 Characteristics of relocation domains Relocation domains have the following characteristics: