If possible, the surrogate LPAR is configured according to the needed processor and memory  value of the original LPAR, but the implementation considers the available resources as  sufficient if they are equal to or larger than the configured processor or memory minimum  value of the active LPAR profile. The available values are applied to the surrogate LPAR if the  resources are not allocatable. Immediately before the HMC initiates the cloning of the original partition, the evaluation of the  available processor and memory resources on the server is repeated. If they are not  sufficient, a new operation of acquiring resources is started through the librpp component. If  the resource activation operation fails again, more attempts are done by a specific retry  mechanism. If the activate operation succeeds, then the Live Update process can continue. The activation of the Mobile CoD resources is not a strict reservation of resources for the  clone operation. It is an acquisition into the free pool that is available for all the partitions that  are defined on the server. The real acquisition of the resources is run by the HMC during the  clone step.  Figure 1-1 shows the flow diagram for PEP resource acquisition to the pool of free resources  of a system followed by the resource allocation during the AIX Live Update clone phase. In some cases, the Live Update operation might fail during the surrogate boot phase due to a  lack of resources. In those cases, a new request to acquire resources from the PEP is done  through  librpp . Similar to the clone process step, a retry mechanism covers the situation if  the resource acquisition fails again. If the acquire operation succeeds, then Live Update can  continue. Figure 1-1 Flow diagram for PEP resource acquisition and allocation during AIX Live Update 8  IBM AIX Enhancements and Modernization Original LPAR Surrogate LPAR CEC Free Pool  Resources: Processor & Memory Power Enterprise Pool Mobile Capacity on Demand  Resources: Processor & Memory Resourse acquisition Resourse allocation Clone operation