Data migration method and device, and computer system

Abstract

The embodiments of the present invention provide a data migration method, device, and computer system; on the basis of the method, speed of data migration is increased and system performance is improved. The method comprises: a process P0 migrating from a logical node i to a logical node j, then determining, according to the virtual address of the process P0 on the logical node i, the physical address, on the logical node i, of the data accessed by said process P0; according to the physical address, on the logical node i, of the data accessed by said P0, copying, from the first memory of said logical node i to the cache of said logical node j, the data accessed by said process P0; if it is determined that the data accessed by process P0 satisfies conditions for migration, migrating the data accessed by said process P0 from the cache of the logical node j to a first memory of the logical node j. This method is suitable for use in the technical field of computers.

Description

technical field [0001] The present invention relates to the field of computer technology, in particular to a data migration method, device and computer system. Background technique [0002] The non-uniform memory access architecture (Non Uniform Memory Access Architecture, NUMA) architecture is a kind of server architecture, which logically divides the entire server system into multiple nodes, and each logical node is assigned a central processing unit (Central Processing Unit, CPU ) and a corresponding piece of physical memory, each logical node can access the memory resources of the node (local memory), and can also access the memory resources of other nodes (remote memory), but the speed of accessing local resources is much faster than accessing remote Memory, generally under the NUMA architecture, the delay of accessing remote memory is 3-20 times that of accessing local memory. [0003] The NUMA architecture has the advantages of easy management and good scalability. H...

AI Technical Summary

Problems solved by technology

However, it takes a long time to directly migrate the data accessed by the process from the source logical node to the destination logical node, which brings a lot of overhead, and it is still far from ideal to improve system performance.

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