In the release process, the de-allocation order is On/Off CoD, then EPCoD, and then the  server’s free pool because you always must pay an extra cost for the On/Off CoD. After the release process completes, you can find the detailed information about compute,  identify, and release processes in the  hacmp.out  file, as shown in Example 6-29. More than one HMC can be configured for a node so that if one HMC fails to respond, the  ROHA function can switch to the other HMC. This section describes the mechanism that enables the HMC to switch from one HMC to  another HMC. Suppose that you have for a node three HMCs in the following order: HMC1, HMC2, and  HMC3. (These HMCs can be set either at the node level, at the site level, or at the cluster  level. What counts is that you have an ordered list of HMCs for the node). The node uses the first HMC in its list, for example, HMC1, and uses it while it works. 6.12 HMC HA introduction Example 6-29 The hacmp.out log information in the release process of example 2 ===== Compute ROHA Memory ===== minimum + running = total <=> current <=> optimal <=> saved 8.00 + 80.00 = 88.00 <=> 158.00 <=> 70.00 <=> 126.00 : => 70.00 GB ============ End ============== === Compute ROHA PU(s)/VP(s) == minimal + running = total <=> current <=> optimal <=> saved 1 + 9 = 10 <=> 17 <=> 7 <=> 14 : => 7 Virtual  Processor(s) minimal + running = total <=> current <=> optimal <=> saved 0.50 + 4.50 = 5.00 <=> 8.50 <=> 3.50 <=> 7.00 : => 3.50  Processing Unit(s) ============ End ============== ===== Identify ROHA Memory ==== Total Enterprise Pool memory to return back: 49.00 GB Total On/Off CoD memory to de-activate: 21.00 GB Total DLPAR memory to release: 70.00 GB ============ End ============== === Identify ROHA Processor === Total Enterprise Pool CPU(s) to return back: 1.00 CPU(s) Total On/Off CoD CPU(s) to de-activate: 3.00 CPU(s) Total DLPAR PU(s)/VP(s) to release: 7.00 Virtual Processor(s) and  3.50 Processing Unit(s) ============ End ============== clhmccmd: 49.00 GB of Enterprise Pool CoD have been returned. clhmccmd: 1 CPU(s) of Enterprise Pool CoD have been returned. The following resources were released for application controllers App1Controller. DLPAR memory: 70.00 GB On/Off CoD memory: 21.00 GB Enterprise Pool  memory: 49.00 GB. DLPAR processor: 3.50 PU/7.00 VP On/Off CoD processor: 3.00 CPU(s) Enterprise Pool processor: 1.00 CPU(s) Chapter 6. Resource Optimized High Availability  247