Snapshot creating method and system as well as application server

Abstract

The invention discloses a snapshot creating method and system and an application server, which are applied to an SAN (Storage Area Network) based on iSCSI (Internet Small Computer System Interface). The method comprises the following steps of: configuring a snapshot creating condition on a snapshot agent according to the service idle condition of the application server, and notifying an application program to stop data reading and writing and simultaneously refreshing a cache when the snapshot agent finds that the snapshot creating condition is met; sending a snapshot creating request to storage equipment by the snapshot agent, receiving the request by the storage equipment and creating snapshot to a logic unit (LUN) of the application server. The storage data protection effect is optimized in the invention.

Description

technical field [0001] The invention relates to the technical field of snapshots, in particular to a snapshot creation method, system and application server. Background technique [0002] Internet Small Computer System Interface (iSCSI, Internet Small Computer System Interface) is a SCSI transmission protocol based on Transmission Control Protocol (TCP, Transmission Control Protocol) / Internet Protocol (IP, Internet Protocol), used between application servers and storage systems SCSI commands and data are transmitted between IP networks. At present, iSCSI technology has been standardized, such as: RFC3720, RFC3721, etc., and has gradually been widely used in the industry. [0003] figure 1 A typical application environment for the iSCSI protocol, such as figure 1 As shown, an iSCSI initiator (initiator) module is installed on the application server, and an iSCSI target (target) module is integrated in the storage device. The initiator of the application server encapsulate...

AI Technical Summary

Problems solved by technology

[0013] However, the disadvantage of the existing solution is: once the business changes on a certain day, for example: the traffic at 12:00 on a certain day is very heavy, or, at 12:00 on a certain day, the enterprise wants to take a snapshot of important data for data protection, then you need to quickly modify the snapshot settings

At this time, these emergencies need to be operated quickly at the first time, but since the snapshot creation process must be controlled by the storage device administrator, it is very inconvenient and may not achieve the expected effect of data protection

Therefore, the existing solutions completely hand over the control of storage data protection to storage devices, but the application servers using these storage data cannot actively participate in the data protection process, resulting in unsatisfactory data protection effects

In addition, the messages between the existing snapshot agents and storage devices use their own private protocols, which is not conducive to mutual compatibility.

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