Method and device for memory migration

Abstract

The invention discloses a memory migration method and a memory migration device. The memory migration method comprises the steps of: when a memory data migration request of a random source node in a storage system is received, dividing to-be-migrated data according to memory blocks on the basis of continuity of physical addresses of the to-be-migrated data, and determining the number of occupied memory blocks of the source node after dividing of the to-be-migrated data; acquiring memory blocks of which the number is same with the number of the occupied memory blocks of the source node after dividing of the to-be-migrated data in a target node in the storage system; and migrating the to-be-migrated data to the memory blocks in the target node according to the divided memory blocks. The invention further discloses a corresponding memory migration device. According to the memory migration method provided by the embodiment of the invention, through combining and dividing the to-be-migrated data according to the memory blocks, the memory blocks with continuous physical addresses are acquired from the target node; the to-be-migrated data are migrated from the source node to the memory blocks of the target node according to the memory blocks; and the number of context switching in migration can be reduced and a memory migration efficiency can be improved in the memory migration process.

Description

technical field [0001] The invention relates to the field of storage technology, in particular to a memory migration method and device. Background technique [0002] In the non-uniform memory access (Non-Uniform Memory Access, NUMA) architecture, the system is divided into multiple nodes (Node), each node has its own central processing unit (Central Processing Unit, CPU) and memory, node and node Connect and communicate through interconnection modules, such as figure 1 A schematic diagram of the full interconnection of the NUMA architecture shown. Therefore, for the CPU in each node, there are two distances for the memory it accesses: one is the memory in the node, that is, the near-end memory; the other is the memory in other nodes, that is, the remote memory. Take the connection and interaction of two nodes of a fully interconnected machine with NUMA architecture, such as figure 2 The connection diagram of two nodes on the NUMA architecture is shown. When the CPU on no...

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Problems solved by technology

[0009] However, whether it is process memory migration or memory hot removal, when relocating pages, it is relocated page by page. Using kernel page migration to trigger multiple context switches not only greatly occupies CPU utilization, but also due to frequent Switching causes the destination memory of the application to be insufficiently continuous, which reduces the hit rate

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