DATA STORAGE METHOD, SDN CONTROLLER AND DISTRIBUTED NETWORK STORAGE SYSTEM

• Main Author: ZHOU, Jingcai
• Format: Patent
• Language: English; French; German
• Published: 28.11.2018
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; PHYSICS; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

Embodiments of the present invention provide a data storage method, an SDN controller, and a distributed network storage system, where a metadata management node and a data node of the distributed network storage system are connected and communicate with each other using an SDN switch; the SDN switch is further connected to the SDN controller; the metadata management node sends a backup mapping relationship of a destination data node to the SDN controller, so that the SDN controller generates a first flow entry according to the backup mapping relationship of the destination data node of the SDN controller, and sends the first flow entry to the SDN switch, where the first flow entry includes an address of the destination data node and an address of a backup data node of the destination data node; and the SDN switch broadcasts, to the destination data node and the backup date node according to the first flow entry, a write request sent by a client according to metadata. Because the SDN switch broadcasts the write request to both the destination data node and the backup data node, an I/O latency of storing to-be-written data from the destination data node to the backup data node is reduced.