Consistency group management method and device, storage management system, storage medium and program product

By embedding pending tasks and sending interruption requests for consistency groups in the storage system, the business impact and data corruption caused by storage pool failures are resolved, achieving fast and atomic consistency group management.

CN121411697APending Publication Date: 2026-01-27DAWNING INFORMATION IND (BEIJING) CO LTD +2
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Patent Information

Application Number
CN202511354029.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-22
Publication Date
2026-01-27

AI Technical Summary

Technical Problem

In a storage system, if a storage pool in a consistency group fails, the inability to manage it in a timely manner can affect the business of other storage pools and may lead to data logic corruption and resource leaks.

Method used

When creating a consistency group snapshot, pending tasks are persisted to the system disk, and a silent request is sent to member volumes to stop I/O operations. If the storage pool fails, an interrupt flag is persisted to the system disk and an interrupt request is sent to ensure that all member volumes process consistently in failure scenarios.

Benefits of technology

Ensure that all member volumes either succeed or roll back completely, preventing data logic errors caused by incomplete snapshots, achieving second-level breakpoint resume and atomic recovery, and avoiding resource leaks.

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Abstract

The invention relates to a consistency group management method and device, a storage management system, a storage medium and a program product. Comprising the steps that when a consistency group snapshot is created, tasks to be processed of a consistency group are solidified in a system disk; sending a silence request to each member volume corresponding to the consistency group; in the process of creating the snapshots corresponding to the member volumes, if a storage pool to which any member volume belongs fails, solidifying an interrupt mark of a to-be-processed task in a system disk, and sending an interrupt request to each member volume; the system disk is a combination of all disks in the storage management system; member volumes included in the consistency group are volumes in a plurality of different storage pools; each storage pool is composed of different disks in the storage management system; the silence request is used for indicating each member volume to stop receiving and processing a new input / output IO request. According to the method, the consistency group can be managed when the storage pool fails.
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