Control method and system based on virtual tape library backup and near-line storage node

Abstract

The invention relates to control method and system based on virtual tape library backup and a near-line storage node. In the control method, a host passage interface driving module judges whether the destination device of SCSI command is Data Mover module or not, if the destination device of SCSI command is the Data Mover module, the host passage interface driving module is ordered to receive the command, and the Data Mover module transmits the command to an SCSI command processing module; after receiving, analyzing and executing the command, the SCSI command processing module feeds the result back to the Data Mover module; after receiving the result, the Data Mover module imitates an entity Data Mover device to respond an SCSI command format and transmits the corresponding command response to the host passage interface driving module; and the host passage interface driving module sends the received command response out according to the address of the destination device. By applying the invention, the problem of compatibility among the Data Mover device, the tape library and the virtual tape library is solved, and that the data is ensured to be directly transmitted between two storage devices in an SAN structure.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a VTL (Virtual Tape Library, virtual tape library)-based backup control method, system and near-line storage node. Background technique [0002] Backup is the best way for users to protect their important and irreplaceable information. Some users regularly back up recently generated data from their computers to a set of disks or tapes for reliable data storage. Backup is a data security strategy. It is to copy the original data exactly the same. Strictly speaking, two copies should be made and stored in different places. When the original data is lost or damaged, use the backup data to restore the original data so that the system can work normally. [0003] Traditional backup systems include the following methods: [0004] 1) For host-based backup, it is necessary to install a tape drive on each host to back up the local system. In this structure, the tape libra...

AI Technical Summary

Problems solved by technology

[0011] The disadvantages of this backup method are: compatibility problems between external Data Mover devices, tape libraries, and virtual tape libraries; and high hardware costs, complex deployment and installation, and high labor costs for later maintenance

[0012] Therefore, it is currently necessary to provide a technical solution for controlling backup data, which can realize the direct transmission of data between two storage devices in the SAN structure, reduce the host system resources such as CPU, memory and I / O of the production node server, and at the same time It can solve the problems of compatibility between external Data Mover devices, tape libraries and virtual tape libraries, as well as complex deployment and implementation

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