Application disaster tolerance method based on CDP and iSCSI virtual disk technology

Abstract

The invention relates to an application disaster tolerance method based on the CDP and the iSCSI virtual disk technology. The application disaster tolerance method based on the CDP and the iSCSI virtual disk technology comprises the steps that firstly, CDP data blocks are stored in an OFS storage medium and an NFS storage medium respectively; secondly, after service roll data are damaged, data in the NFS storage medium are organized into a mounting roll according to the iSCSI virtual disk technology to be mounted on a host computer to serve as a temporary service roll to be used by a host computer service system, new service data are saved in the OFS storage medium, and data recovery is conducted on the original service roll by means of data in the OFS storage medium; after data recovery of the original service roll is completed, the service system is stopped in a service idle time, the new data are recovered to the original service roll, and the service system is switched back to the original service roll. Compared with the prior art, the application disaster tolerance method based on the CDP and the iSCSI virtual disk technology has the advantages that reservation of the new data is achieved when the mounting roll serves as the temporary service roll, and data recovery of the original service roll is achieved under the condition that service interruption is not needed.

Description

technical field [0001] The invention relates to the technical field of computer information storage, in particular to an application disaster recovery method based on CDP and iSCSI virtual disk technology. Background technique [0002] With the exponential growth of data volume and speed in the information age, the value of data is undoubtedly highlighted, and enterprises invest huge costs to protect data and key business systems. However, due to various subjective or objective reasons, data damage and business system interruption occur from time to time, which brings great losses and inconvenience to enterprises. Data protection is becoming extremely important and urgent. [0003] It is unrealistic to always guarantee that the business system will not go wrong. How to quickly restore the available state after the system failure causes business interruption to ensure the fast and reliable recovery of the business system? CDP (Continuous Data Protection) technology is curren...

AI Technical Summary

Problems solved by technology

If the object file system is simply used as the CDP data storage medium, although data at an infinite number of time points can be retained and enough time points are provided for disaster recovery, as the timeline extends, the amount of data increases and the retrieval of data blocks Due to the complexity, the recovery process will last for hours or even days; if you choose to use the original file system as the CDP data storage medium, write the CDP data in real time to the volume image file created on the original file system, and regularly check the Take a snapshot of the volume. When data damage occurs and the business system fails, the mirror file is directly hung up through the iSCSI (Internet Small Computer System Interface) virtual disk technology and provided to the business system. Although this method can greatly shorten the RTO, But it also has the following problems: first, the volume is hung up for temporary use by the business system, how to preserve the newly added data during the period? Secondly, how to quickly restore data to the original business volume? Again, how to solve the problem of application data consistency?

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