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| About the SystemList attribute | ||
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The SystemList attribute designates all systems on which a service group can come online. By default, the order of systems in the list defines the priority of systems used in a failover. For example, the following definition configures SystemA to be the first choice on failover, followed by SystemB and then SystemC.
SystemList = { SystemA, SystemB, SystemC}
System priority may also be assigned explicitly in the SystemList attribute by assigning numeric values to each system name. For example:
SystemList = {SystemA=0, SystemB=1, SystemC=2}
If you do not assign numeric priority values, VCS assigns a priority to the system without a number by adding 1 to the priority of the preceding system. For example, if the SystemList is defined as follows, VCS assigns the values SystemA = 0, SystemB = 2, SystemC = 3.
SystemList = {SystemA, SystemB=2, SystemC},
Note that a duplicate numeric priority value may be assigned in some situations:
SystemList = {SystemA, SystemB=0, SystemC}
The numeric values assigned are SystemA = 0, SystemB = 0, SystemC = 1.
To avoid this situation, do not assign any numbers or assign different numbers to each system in SystemList.