Logical object data duplication method and related device

Abstract

The invention discloses a logical object data duplication method and a related device, which are used for reducing storage resources consumed when performing logical unit number duplication. The method comprises the following steps of: acquiring a difference bitmap, wherein the difference bitmap is used for storing corresponding state information that whether each data block in a source logical object is duplicated to a target logical object; monitoring whether a write request for modifying the data block in the source logical object is received; and if the monitoring result is that the write request is not received, determining the data block, not duplicated to the target logical object, in the source logical object according to the difference bitmap, duplicating the data block to the target logical object, and updating the state information of the data block in the difference bitmap.

Description

Logical object data replication method and related device technical field The invention relates to the technical field of storage, in particular to a method for duplicating logical object data and a device for duplicating logical object data. Background technique In order to facilitate the management of more and more devices or objects, the prior art proposes the concept of a Logical Unit Number (LUN, LogicalUnitNumber). The storage system assigns a logical unit identifier (LUNID) to each object that needs to be described, so as to expand the original target identifier (TargetID) that can only describe the devices attached to the Small Computer System Interface (SCSI, SmallComputerSystemInterface) bus . A LUNID is not equivalent to a physical device, and the object it describes can be a device such as a tape drive or a virtual object such as disk space. A typical application of LUNID is to divide the disk space of a disk array into several small storage resource units (...

AI Technical Summary

Problems solved by technology

The inventor found in the process of the present invention that there are at least the following problems in the prior art: when the existing snapshot-based LUN replication technology performs LUN replication, it is necessary to create a disk array for storing the source logical object in the disk array where the source logical object is located. The snapshot volume of the data copy at a certain time will occupy a certain amount of storage resources

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