Device for building checkpoints for heterogeneous memory system

Abstract

The invention discloses a device for building checkpoints for a heterogeneous memory system, and belongs to the technical field of system fault tolerance of the computer system structure. The device solves the problem that the checkpoints based on storage for heterogeneous memory are overlarge in technical overhead and have a great deal of useless write-in. The device comprises a heterogeneous memory management module, an address mapping module, a derivative page management module, and a checkpoint dispatching module. The heterogeneous memory management module controls data of heterogeneous memory moving between a DRAM and an NVM. The address mapping module provides fine-grit and low-overhead address mapping strategies, when request tries to modify data of the checkpoints, the address mapping module will have the request mapped to other hardware addresses so as to keep consistency of data in checkpoints. The derivative page management module controls derivative pages. The checkpoint dispatching module controls when to trigger the checkpoints. The device is transparent to upper applications that memory usage and redundant write-in are effectively reduced, useless write-in is reduced during checking consistency of the checkpoints, and system operation time is shortened.

Description

technical field [0001] The invention belongs to the system fault-tolerant technology of computer system structure, and in particular relates to a device for establishing checkpoints for heterogeneous memory systems. Background technique [0002] Checkpoint technology is a technology commonly used in the field of system fault tolerance. It saves information such as working data and central processing unit (CPU) status in the system memory as checkpoints to non-volatile storage media. When the system encounters a failure, The information in the checkpoint can restore the system to the state when the checkpoint is established. [0003] Traditional memory-based checkpoint technology stores checkpoints in hard disks or solid-state disks. Limited by the read and write performance of hard disks and solid-state disks, memory-based checkpoint technology is difficult to perform at high frequencies, which limits the fault tolerance of the system. The memory checkpoint technology can s...

AI Technical Summary

Problems solved by technology

[0024] The present invention provides a device for establishing a checkpoint for a heterogeneous memory system, which solves the problems of excessive overhead and a large number of useless writes in the existing storage-based checkpoint technology for heterogeneous memory

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