Global address space management method for distributed persistent memory

Abstract

The invention discloses a global address space management method for a distributed persistent memory. The global address space management method comprises the steps that a local address allocator initiates a page allocation request; the global monitor receives a page allocation request, and selects a corresponding number of slave copy nodes to allocate idle pages; after distribution of the slave copy nodes is completed, corresponding page addresses are returned to the global monitor; after the global monitor receives all messages returned from the slave copy nodes, a unique global address is distributed, a global address mapping table is updated, and global address mapping information in the updated global address mapping table is returned to the slave copy nodes; and the slave copy nodescache the global address mapping information through a mapping table buffer, and manages the data page through a local address allocator to process a data allocation request with any granularity. According to the method, the atomicity during global address space allocation in the distributed persistent memory system can be ensured, the performance, reliability and expansibility during global address allocation are improved, and meanwhile, the recovery capability of the system after crash is ensured.

Description

technical field [0001] The invention relates to the technical field of persistent memory storage, in particular to a global address space management method of distributed persistent memory. Background technique [0002] Non-volatile memory technology (non-volatile memory, NVM), as a new type of memory-level storage device, has the characteristics of low read and write latency, high bandwidth, data persistence, byte addressability, and low energy consumption. Non-volatile memory technology not only has a persistent storage capability similar to traditional storage devices such as disks, but also has read and write performance similar to that of Dynamic Random Access Memory (DRAM). In the face of high-performance memory-class storage devices, it is of great significance to construct a distributed storage system that can fully utilize non-volatile memory devices. [0003] In the storage system of the related technology, one is to store the data in the traditional disk in the f...

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Problems solved by technology

[0006] For this reason, the object of the present invention is to propose a kind of global address space management method of distributed persistent memory, and this method solves the problem of poor data reliability in distributed storage systems, poor recovery performance under machine crash conditions, low throughput and delay lower question

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