Data storage method and device

Abstract

The disclosure relates to a data storage method and device. The method is applied to a server deployed with a named node in a distributed file system, and the distributed file system also includes a client and M data nodes in different computer rooms. The method includes: receiving a data block creation request from a client; determining a data node that can carry a copy of the data block according to the computer room identifier and status information of the data node and the client computer room identifier; creating a data block copy of the data block; sending data to the client The attribute information of the block, so that the client writes the file according to the attribute information. According to the embodiment of the present disclosure, according to the state of the data node and the identification of the computer room, it is possible to determine the data node that can carry the copy of the data block, create the copy of the data block and send the attribute information of the data block to the client, so that the client can write the file to Multiple data nodes realize data storage in multiple computer rooms and improve the availability of the distributed file system.

Description

technical field [0001] The present disclosure relates to the field of computer technology, in particular to a data storage method and device. Background technique [0002] With the continuous development of Internet technology, the demand for information storage is increasing, and people are increasingly using distributed file systems to store data. In order to improve the availability of data, a multi-computer room architecture is usually adopted, that is, the server carrying the data is placed in multiple computer rooms, and the data is stored on the servers in multiple computer rooms in the form of multiple copies. When a single computer room fails or the network is unreachable , you can access the required data through other computer rooms. [0003] In related technologies, some distributed file systems adopt a mode of one main computer room and multiple backup computer rooms. The client writes data to the main computer room and asynchronously or synchronously writes th...

AI Technical Summary

Problems solved by technology

However, in this way, when the network in the computer room is disconnected, data loss or server unavailability may occur, resulting in low availability

Some distributed file systems use multiple copies to be stored in multiple computer rooms, and a distributed protocol is used to select a master copy for reading and writing. When the inter-network is disconnected, the client is unavailable and the availability is low

Images