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Improve LPAR Mobility Performance using Virtual Real Memory

IP.com Disclosure Number: IPCOM000236588D
Publication Date: 2014-May-05
Document File: 1 page(s) / 25K

Publishing Venue

The IP.com Prior Art Database

Abstract

A method to improve logical partition (LPAR) mobility performance using Virtual Real Memory (VRM) is disclosed.

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Improve LPAR Mobility Performance using Virtual Real Memory

Disclosed is a method to improve logical partition (LPAR) mobility performance using Virtual Real Memory (VRM).

LPAR Mobility allows a virtual client to be moved from a Virtual I/O Server (VIOS) on a source Central Electronic Complex (CEC) to a VIOS on a destination CEC. This can be done in an active mode where the client can continue to run while the migration from source to destination VIOS takes place. A key element that enables LPAR Mobility is the movement of data in memory over the network from the source CEC to the destination CEC. Systems have large amounts of real memory that is used by the virtual client partitions. The time to transfer the data from memory is directly related to the amount of real memory that is being used by the virtual client partition.

The disclosed method uses Virtual Real Memory (VRM) services on the virtual client to reduce the amount of physical memory that needs to be transferred during the LPAR Mobility. VRM allows the operating system (OS) to treat memory on the server as virtual memory. Systems can be enabled to use VRM and thus the firmware manages read and write transactions to the systems virtual memory and sends those requests to a block storage device. Virtual Real Memory uses a specialized Virtual I/O Server called a Paging Space Partition to provide read and write services between firmware and a block storage device. This Paging Space Partition contains a Vi...