Data storage and backup system and method

Abstract

The invention provides a data storage method for a data processing system. The data storage method comprises the following steps of: defining a local storage of the data processing system as a logging library; storing data in the logging library in a logging way; transmitting the data from the logging library to a forwarder; and transmitting the data to a secondary storage from the forwarder. By the adoption of the system and the method, the write operation function of a low-performance storage device is enhanced by utilizing a logging mechanism. When the system and the method are applied to backup, the performance of the overall system is improved obviously when the system is used for backup, and the backup system extends to another place easily; and moreover, when the storage of a production system fails, the storage system provided by the invention can be switched to a production mode and the service can be provided within a shortest downtime.

Description

technical field [0001] The present invention relates generally to data storage, and more particularly to a system and method for data storage and backup. Background technique [0002] In general, data backup is performed using storage media such as tapes and disks. In disk backup, for example, a disk used for backup is generally installed in a separate system, and data communication is performed through a network such as IP, iSCSI, or optical fiber. In general use, the performance of the disk used for backup will be lower than that of the host disk. For example, the production system uses SAS disks and the backup system uses SATA disks. The inefficiency of mirroring affects the resources of the production system. In a production environment, system resources are very important to production servers, so it should be avoided that system resources are occupied by processes other than their own production services. On the other hand, if The storage device of the backup sy...

AI Technical Summary

Problems solved by technology

The storage device of the backup system uses the same speed and level as the production system, for example, SAS disks are used, which improves the speed, but also makes the cost of the backup system expensive

In addition, if remote replication is used for backup, since the backup window will be relatively long, the data loss indicator will also increase accordingly, and the protection is not perfect

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