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Data prefetching method of DHT memory system and node and system

A distributed hash table and storage node technology, applied in the information field, can solve the problem of low reading efficiency of DHT storage system, achieve the effect of improving data access efficiency and saving system resources

Active Publication Date: 2011-06-29
HUAWEI TECH CO LTD
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Problems solved by technology

[0004] The embodiment of the present invention provides a data prefetching method, node and system of a distributed hash table DHT storage system to solve the problem of low reading efficiency of the prior art DHT storage system

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  • Data prefetching method of DHT memory system and node and system
  • Data prefetching method of DHT memory system and node and system
  • Data prefetching method of DHT memory system and node and system

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Embodiment Construction

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0027] figure 1 The flow chart of the first embodiment of the data prefetching method of the distributed hash table DHT storage system provided by the present invention, such as figure 1 As shown, the method includes:

[0028] S101. The first storage node receives a read request sent by the client;

[0029] S102. The first storage node determin...

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Abstract

The embodiment of the invention provides a data prefetching method of a DHT (Distributed Hash Table) memory system, a node and a system. The method comprises the following steps: a first memory node receives a reading request sent by a client side, a prefetching data block and a second memory node where the prefetching data block is positioned are defined according to the read data block and a set threshold of the predetching data block, and a prefetching request is sent to the second memory node, wherein the first memory node and the second memory node are identical or different nodes, the prefetching request comprises identification information of the prefetching data block, and the identification information is exclusively used for identifying the prefetching data block; and the secondmemory node reads the prefeching data block from a disk according to the prefetching request, and stores the prefetching data block to a local cache, so that the client side can read the prefetching data block from the local cache of the second memory node. By adopting the embodiment of the invention, the prefetching data block can be directly read from the cache, so that the data visit efficiency of each memory node in the system can be improved.

Description

technical field [0001] The invention relates to the field of information technology, in particular to a data prefetching method, node and system of a distributed hash table (DHT) storage system. Background technique [0002] With the development of the network, information has shown an explosive growth. Point-to-point (Pear to Pear; P2P) storage systems based on distributed hash table (Distributed Hash Table; DHT) technology have high scalability and can support large-scale data storage. However, in P2P and other types of storage systems, a piece of continuous data is divided into several blocks and stored in several nodes of the system, which makes it impossible for the client to read data continuously when reading data from the system, resulting in data read low efficiency. [0003] In the data prefetching method of the existing DHT storage system, the client judges the data content and storage location to be used next time according to the access rules of the applicatio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08G06F12/0862
CPCH04L29/0881G06F2212/314G06F12/0862H04L67/2847G06F2212/1024G06F12/0215G06F8/4442H04L67/5681
Inventor 鲍栋杨德平
Owner HUAWEI TECH CO LTD
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