What is an LPAR?
An LPAR is the acronym for “Logical Partitions.” IBM delivers a physical IBM mainframe to the customer. Each physical mainframe can operate up to 15 logical partitions at one time but there have been rumors of expanding the capabilities. Each LPAR runs a version of the z/OS operating system. Some customers elect to run test LPARs and production LPARs on the same physical machine. Others may elect to isolate test and production LPARs by ordering a second machine. Each LPAR runs independently and may have different security software depending on geographical location and licensing agreements.
Related Questions
- If a server has LPAR capability, can two or more LPARs be configured with unique instances of PowerHA running on them without incurring additional license charges?
- For readers who aren mainframe gurus, can you explain the difference between LPAR, VM, CP, and CMS?
- Does PowerHA support dynamic LPAR, CUoD, On/Off CoD, or CBU?
