Data storage method, sdn controller and distributed network storage system

Abstract

An embodiment of the present invention provides a data storage method, an SDN controller, and a distributed network storage system. The metadata management node and the data node of the distributed network storage system are connected and communicated through an SDN switch, and the SDN switch is also connected to the SDN The controller is connected, and the metadata management node sends the backup mapping relationship of the destination data node to the SDN controller, so that the SDN controller generates the first flow entry according to the backup mapping relationship of the destination data node and sends it to the SDN switch. The first flow entry Including the address of the destination data node and the address of the backup data node of the destination data node, the SDN switch broadcasts the write request sent by the client according to the metadata to the destination data node and the backup data node according to the first flow entry, because the SDN switch broadcasts The method broadcasts the write request to the destination data node and the backup data node at the same time, thereby reducing the I / O delay when storing the data to be written from the destination data node to the backup data node.

Description

technical field [0001] The embodiments of the present invention relate to data communication technology, and in particular to a data storage method, an SDN controller and a distributed network storage system. Background technique [0002] With the demand for massive data storage, the traditional storage system can no longer meet the needs of users. Therefore, the application of distributed storage system was born. Although the distributed storage system can meet the needs of massive data storage, due to the large network delay of the distributed storage system, it can only be used in application scenarios that are not sensitive to delay. [0003] figure 1 It is a schematic structural diagram of an existing distributed network storage system, such as figure 1 As shown, the distributed network storage system includes a metadata management node and multiple data nodes (data nodes), and the metadata management node manages the name space of the distributed network storage syst...

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Problems solved by technology

[0004] Through the above description, when the client writes the data to be written to the primary data node, and the primary data node writes the data to be written to the backup data node, it needs to go through the network operation multiple times. The delay of one network operation is about 200us, so , the existing distributed network storage system has a large network delay, which limits its application to application scenarios that are not sensitive to delay

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