A method and system for ensuring data crash consistency

Abstract

The invention discloses a method and system for ensuring data crash consistency. The method includes the steps that the writing frequency of a first cache line corresponding to a write request is determined; when the writing frequency of the first cache line is larger than or equal to a threshold, data corresponding to the write request is written in a second cache line of a nonvolatile cache memory; when the writing frequency of the first cache line is smaller than the threshold, the data in the first cache line is migrated into a nonvolatile memory, and after the data of the first cache line is migrated, data corresponding to the write request is written in the first cache line; when a memory transaction where the write request belongs is completed, the data in the first cache line is marked as invalid data and the data in the second cache line is marked as new valid data if the data of the first cache line is not migrated; if the data of the first cache line is migrated, the data in the first cache line is marked as new valid data. By means of the method and system, the number of times of writing operation on the relatively slow nonvolatile memory is reduced, and the performance of a storage system is improved.

Description

technical field [0001] The invention belongs to the technical field of computer storage, and more specifically relates to a method and system for ensuring data crash consistency. Background technique [0002] With the development of computer multi-core technology and computer application technology, the demand for memory in current applications is increasing. The traditional dynamic random access memory (Dynamic Random Access Memory, DRAM) has been Unable to keep up with increasing memory requirements of applications. The new non-volatile memory (Non-Volatile Memory, NVM) has become an ideal storage medium to replace DRAM to provide large memory because of its read and write speed close to DRAM, low standby power consumption, and strong scalability. However, compared with traditional DRAM memory, non-volatile memory cannot directly replace DRAM as memory due to its shortcomings such as limited read and write times, long read and write delay, and high energy consumption for ...

AI Technical Summary

Problems solved by technology

Therefore, the existing technology of ensuring data crash consistency through log technology increases the response delay to user requests and reduces the performance of the entire system

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