LPAR stands for Logical Partitions in mainframe systems. Learn what LPARs are, how they enable running multiple operating system instances on one physical mainframe, and their benefits for resource utilization and workload management.
Table of Contents
Question
What does LPAR stands for?
A. Logical Position of Array Registers
B. Logical Partitions
C. Load Parameter After Reboot
D. None
Answer
B. Logical Partitions
Explanation
LPAR stands for Logical Partitions. In mainframe computing, an LPAR is a subset of a mainframe’s hardware resources virtualized as a separate computer.
Key points about LPARs:
- Allow multiple operating system instances to run on one physical mainframe
- Each LPAR has dedicated CPU, memory, and I/O resources
- Resources can be dynamically re-allocated between LPARs as needed
- Provide isolation between workloads for security and stability
- Enable higher resource utilization and simplified management
- Used for running mixed workloads like z/OS, Linux, z/VM, z/VSE, etc. on one machine
So in summary, Logical Partitions (LPARs) are a key virtualization and workload management feature of modern mainframe systems. They provide the flexibility to run multiple environments on one physical box while still keeping workloads isolated. This allows mainframes to efficiently handle diverse workloads and meet varying business requirements.
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