Perform DLPAR of Memory and Processor using HMC GUI

DLPAR using the HMC Graphical Interface (GUI)

Dynamic Logical Partitioning (DLPAR) is a technology that is part of PowerVM. With the help of DLPAR we can visualize the CPU and Memory assigned to the Partition. HMC Provides two ways to increase or decrease the processors and memory assigned to the Logical Partition i.e, command line and graphical interface.

Memory DLPAR

To modify the memory assigned to Logical Partition login to HMC Console search for Logical Partition and go to its Memory Page. In the memory page we see three settings Maximum, Allocated and Minimum. User will be allowed to change all the three option if LPAR is in shutdown /Not Activated state. If LPAR is in Running state and RMC is active then user will have only option to change the Allocated amount of Memory and this process is refereed as DLPAR of Memory.

Below screen shot is an example for Logical Partition Memory page where Maximum is 12 GB, Allocated is 11 GB and Minimum is 4 GB suggests that User will have option to increase or decrease the allocated memory between 12 to 4 and currently its 11 GB.



Below Screenshot changes the allocated memory to 10 after modifying it from 11 to 10 we need to select the save option provided in the red mark.



Once the task is done we are successfully decreased the partition memory by 1GB. Similarly we can also increase the memory by changing the allocated to 12 GB and save the settings.

Processor DLPAR

As we have seen the Memory DLPAR to modify the processor of Logical Partition go to Partition Processor Page and similarly we can see three settings Maximum, Allocated and Minimum. User will be allowed to change all the three option if LPAR is in shutdown /Not Activated state. If LPAR is in Running state and RMC is active then user will have only option to change the Allocated amount of Processors.

Below screenshot the allocated amount of processors are 7 CPU and Maximum, Minimum are 8 and 2 respectively. User will ab allowed to change the allocated processor settings between the Maximum and Minimum range.


We will be reducing the processor allocated from 7 to 6 CPU in the below example. Once the changes have done we will be saving the settings by clicking the save option highlighted in red mark rectangle box.



The task will display that operation will be successful. We have decrease the CPU for a partition similarly we can increase the CPU as well. These process is refereed as Dynamic Logical Partition of Memory and CPU.

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