Memory: Converting Base Memory to Float Memory

In vPars A.04.xx and A.03.xx, all memory is base memory, meaning this memory cannot be removed from a virtual partition while the virtual partition is up. In vPars A.05.xx, if you wish to remove memory from a virtual partition while the virtual partition is up, you will need to have that amount of memory added to the virtual partition as float. By default, all memory assigned to a virtual partition is base memory, so below is the process to convert base memory to float memory. There is no vPars command to do this automatically.

Decide how much memory you wish to have as dynamically migratable memory. Note that each virtual partition requires enough base memory to load and run the kernel. See also “Performance Note for Base versus Float Memory Amounts” and Appendix F for information on a virtual partition’s base memory requirements.
For our example, let’s assume that on keira3, we wish to convert 512 MB of existing ILM base memory to ILM float memory.
Because :base memory can only be removed from a partition while the partition is down, shut down the target partition. keira3# shutdown -hy 0
Remove the amount of :base memory from the target partition that you wish to convert to :float memory. keira1# vparmodify -p keira3 -d mem::512
Add that amount of memory as :float to the target partition. keira1# vparmodify -p keira3 -a mem::512:float
Boot up the target partition. keira1# vparboot -p keira3




	NOTE: If you have the available memory and do not wish to shut down the target virtual partition, instead of converting base memory to float memory, you can simply add that amount of memory as float memory while the target partition is up: keira3# vparmodify -p keira3 -a mem::512:float Mixed vPars Environments In a mixed HP-UX 11i v2/v3 vPars environment, or a mixed HP-UX 11i v1/v2/v3 vPars environment, dynamic memory migration is only supported on the vPars versions that support dynamic memory migration. In other words, the both source and target virtual partitions must be running vPars A.05.xx. It is possible to perform add/delete memory operations on virtual partitions running A.04.xx, as long as the target virtual partition is in the `down` state. Note that the vparmodify command must be executed on a virtual partition running vPars A.05.xx. For more information on mixed HP-UX 11i v2/v3 vPars environments or mixed HP-UX 11i v1/v2/v3 vPars environments, see “Mixed HP-UX 11i v2/v3 vPars Environments in vPars A.05.xx” or “Mixed HP-UX 11i v1/v2/v3 vPars Environments in vPars A.05.03”.

Memory: Converting Base Memory to Float Memory

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