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Failover method of storage service in double controller storage system

A dual-controller, failover technology, applied in the field of iSCSI Target service failover, to improve availability, avoid data incompleteness, and reduce the possibility of

Active Publication Date: 2011-07-06
LANGCHAO ELECTRONIC INFORMATION IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a storage system that provides iSCSI storage services, if there is only one storage controller, when the storage controller in the application fails, the iSCSI storage application will be interrupted, which may cause business interruption or even data incompleteness

Method used

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  • Failover method of storage service in double controller storage system
  • Failover method of storage service in double controller storage system
  • Failover method of storage service in double controller storage system

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Embodiment Construction

[0027] The switching method of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] In a dual-controller storage system, when a single controller fails, the iSCSI Target service is switched to another controller. The structure of the dual-controller storage system is that both controllers are connected to the same disk group and access all disks at the same time. In terms of operating system and software, each controller system is installed with iSCSI Target service software. The characteristics of the iSCSI Target software and service are: the ability to create more than two iSCSI TargetNodes; As a SCSI logical unit LU and assign a specified logical unit number LUN to the LU; a SCSI ID can be specified for each LU, where the SCSI ID is the identification of the logical unit, and a unique value is used to represent the logical unit. Adding an LU When the iSCSI initiator executes the INQUIRY command and sets EVPD in the I...

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PUM

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Abstract

The present invention provides a failover method of storage service in a double controller storage system, and the failover steps are as follows: disconnecting a power supply of a failed controller by an electrical switch; taking over the iSCSI Target nodes and logic storage units of the failed controller; and binding the failed controller ip and carrying out arp broadcasting. The failover of the iSCSI target service can ensure continuous availability of the double controller storage system when single controller is failed.

Description

technical field [0001] The invention relates to computer network storage technology, in particular to a method for iSCSI Target service failover on a dual-controller ip-san storage system and equipment. technical background [0002] SCSI (Small Computer System Interface, small computer system interface) is a high-performance computer peripheral device interface. Through this interface, all external devices connected to the PC can realize data transmission and distribution independent of the host through the HBA (Host Bus Adapter, host bus adapter). The main function of the current SCSI protocol is to transfer commands, status and block data between the host computer and the storage device. The SCSI architecture defines the relationship between an initiator (host) and a target (eg, disk, tape) as a client / server exchange. The SCSI-3 application client is on the host, and it describes the I / O requests of high-level applications, file systems, and operating systems. The SCS...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L29/08
Inventor 施培任
Owner LANGCHAO ELECTRONIC INFORMATION IND CO LTD
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