Hu Yoshida


Blog Post created by Hu Yoshida Employee on Nov 11, 2014

Jun 12, 2014


“A logical partition, commonly called an LPAR, is a subset of computer’s hardware resources, virtualized as a separate computer. In effect, a physical machine can be partitioned into multiple logical partitions, each hosting a separate operating system.” from Wikipedia


The value of LPARs is the ability to dynamically scale compute resources, increase availability, and dynamically load balance resources to maintain quality of service. LPARs can be thought of as hardware virtualization as opposed to software or hypervisor virtualization. IBM developed the logical partitioning function and mode of operation back in 1972 for the S/370 mainframe. Today LPARs are available in mainframes and UNIX processors. Hitachi Data Systems employs the LPAR concept in their storage virtualization systems, Hitachi VSP and HUS VM, to ensure quality of service and privacy for applications that share the same physical storage resources behind the storage virtualization layer.

Hitachi Data Systems is also one of the few vendors to provide LPAR functionality in their X86 blade servers.  This LPAR functionality was developed for Hitachi mainframes back in the mid 1980’s and has been available on Hitachi x86 blades servers since the mid 2000’s.


For more information on Hitachi’s x86 LPAR technology see:

At Sapphire NOW+ASUG Conference, last week in Orlando Florida, Hitachi Data Systems announced that the LPAR technology on Hitachi x86 servers has been verified to run SAP Business Suite software to enable secure, scalable production environments for on-premise and cloud deployments of SAP solutions.

In EMEA, customers have already implemented this solution. One such customer is Duisburger Versorgungs- und Verkehrsgesellschaft mbH (DVV), known as DU-IT. Du-IT is the leading provider of IT services in and for the city of Duisburg, its subsidiaries and other
municipal customers. Working with Green Data Systems, their SAP infrastructure partner they chose the Hitachi Data Systems x86 blade servers to consolidate their virtual SAP environment, optimize availability across two locations 34 km apart, reduce power and licensing cost, and simplify the management and administration of their SAP environment. They achieved all these goals with the help of x86 with LPAR technology. The LPAR technology enabled them to share resources, CPU and memory with logical partitions, virtual instances, or applications in a dynamic or dedicated way. This not only helped to increase SAP applications and database performance, availability, and security, but also increased their cost benefits through increased utilization of servers, reduction in rack space, power, and cooling, and reduction in software licensing. Visit Green Data Systems website  for more details on this user’s experience.

An internal survey of customers who are using Hitachi x86 blade servers with LPAR technology are realizing improved efficiencies and simplified deployment and management of SAP solutions. Some of the benefits being realized are:

o   Total costs reduced by as much as 70%

o   Improved application density by as much as 33:1

o   Reduction in the number of servers required by up to 80%

o   Space, power and maintenance reduction up to 40%

We have enjoyed a 20 year relationship with SAP, both as a customer and partner. We are pleased to be the only partner to provide SAP customers with the benefits of

LPAR technology on an x86 platform that has the robustness and scalability of mainframes at a fraction of the cost of mainframes.