Non-volatile memory data consistency update method based on one-to-many page mapping

Abstract

The invention discloses a non-volatile memory data consistency update method based on one-to-many page mapping, aiming to solve double non-volatile memory write operation overhead. The technical solution is to build a non-volatile memory consistent update system composed of a dynamic non-volatile memory allocation module, an update cycle management module, a memory access monitoring module, and a non-volatile data version management module, providing dynamic non-volatile memory for user applications. Memory allocation / release interface, maintaining 1 DRAM cache and 2 non-volatile backups for each non-volatile memory object. The non-volatile data version management module consistently writes the content of the DRAM cache to the non-volatile backup page corresponding to the DRAM cache page. During the consistent update process, only one non-volatile backup of the non-volatile memory object is updated. operation, while another non-volatile backup acts as a consistent data backup in case of failure. Using the present invention to perform a consistent update operation on the non-volatile memory only introduces a single write to the non-volatile memory.

Description

technical field [0001] The invention relates to the field of computer system software, in particular to a method for maintaining data consistency of non-volatile memory by means of one-to-many memory page mapping. Background technique [0002] The storage system of the current mainstream computer system can generally be divided into two levels: main memory and auxiliary memory. The main feature of the main memory device (such as DRAM) is to support byte-granularity addressing, fast access speed, and data loss after power failure, while the characteristic of the auxiliary storage device (such as disk) is to only support coarse-grained access (such as data blocks as unit), slow access speed, and non-volatile data. With the improvement of computer computing performance and the expansion of system scale, the above-mentioned storage level constraints make the storage system gradually become the bottleneck of the system's comprehensive performance. Under the above trend, a new s...

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Problems solved by technology

However, most of the internal implementations of such non-volatile programming libraries still rely on the log mechanism, so it is still unavoidable to introduce double write overhead and sequential constraint overhead to NVRAM.

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