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LPAR
(redirected from Logical Partitioning)

    Also found in: Acronyms, Wikipedia 0.01 sec.

(Logical PARtition) A logical segmentation of a mainframe's memory and other resources that allows it to run its own copy of the operating system and associated applications. LPARs are caused by special hardware circuits and allow multiple system images to run in one machine. This can be multiple instances of the same operating system or different operating systems. In the IBM world, this is known as a "virtualized processor complex."

IBM's PR/SM ("prism"), Hitachi's MLPF and Amdahl's MDF are examples of LPARs. MDF was the first to provide in hardware the equivalent of IBM's VM operating system, which supports multiple system images in software. Interestingly, an LPAR can host VM, which itself can host multiple operating systems. See PR/SM and virtual machine.
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With the announcement, Hitachi is enabling companies of all sizes to truly realize the business benefits of Application Optimized Storage solutions, as now even the smallest companies can enjoy the benefits of virtualization by optimizing the performance of their most pressing business applications--such as Microsoft Exchange or Oracle Financials--utilizing the Logical Partitioning capabilities of Hitachi's integrated new fleet of midrange offerings.
Hitachi launches full scale assault on midrange storage market by EDP Weekly's IT Monitor
Additionally, the Hitachi Universal Storage Platform and Network Storage Controller offer clients logical partitioning services that ensure quality-of-service for virtual machines.
Hitachi Data Systems First to Obtain External Storage Virtualization ... by Business Wire
The revolutionary Hitachi controller-based virtualization engine enables clients to leverage the powerful combination of external virtualization, thin provisioning, logical partitioning and storage-agnostic replication to deliver intelligent storage services across the enterprise to all tiers of storage using a secure and proven platform.
Hitachi Announces a New Dimension in Storage Virtualization, ... by Business Wire
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