A Thin Provisioning Synchronization Method for Dual Controller Disk Arrays

Abstract

The present invention relates to a method for automatic thin configuration synchronization of a dual-control disk array, which includes: the preprocessing process includes: the kernel loads the target driver of the automatic IO control device module; defines the mapping between the underlying block device and the automatic IO control device in the user state Relationship; the kernel creates a target device according to the incoming parameters, and records the IO control information in the IO control attribute; creates a mapping table; creates a dm device, records the device type in the dm device metadata area, and generates an automatic IO control device; Creation of thin-provisioned volumes on automated IO control devices; and IO processing. The invention discloses an automatic thin configuration synchronization method of a dual-controller disk array. The method realizes data synchronization of a thin resource allocation volume on a double-controller disk array, and ensures that the thin resource allocation volume realizes failover.

Description

technical field [0001] The invention relates to the technical field of computer information storage, in particular to an automatic thin provisioning synchronization method of a dual-controller disk array. Background technique [0002] With the explosive growth of information and the popularization of information systems, the scale and capacity of storage systems are expanding year by year. In order to ensure that storage capacity can meet current or even future business needs, users usually deploy physical storage space larger than actual needs—"for safety". However, in the actual use process of users, their deployment capacity is usually not fully utilized. Industry research organizations have found that in some projects, the actual used capacity accounts for only 20%-30% of the deployed capacity. Therefore, "thin provisioning" technology came into being to achieve higher storage capacity utilization and bring greater return on investment. Thin provisioning, sometimes ca...

AI Technical Summary

Problems solved by technology

[0004] On the traditional single-controller storage system, the development of thin provisioning technology is relatively mature, but with the continuous improvement of the storage system stability, the dual-controller storage device has replaced the single-controller storage device with a single point of failure. It is also gradually migrating to dual-controller storage devices. Common storage solutions such as NAS and SAN have been successfully applied to dual-controller storage systems, but some advanced functions, including automatic thin provisioning, are not yet mature due to technical difficulties.

The difficulty of thin provisioning for dual-controller storage devices is that the thin provisioning metadata of the two controllers is different, and the update frequency is very high, so it is difficult to ensure the data synchronization of the thin provisioning of the two controllers

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