Storage System Data Replication via Sub-Task Segmentation
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Solution Overview
Problem
Existing disaster recovery systems, particularly 3DC systems, face inefficiencies in data replication to level-2 sites due to reliance on a single replication link, leading to bandwidth bottlenecks and increased costs.
Innovation Solution
A data replication method where a first storage device and a second storage device in a storage system determine and share replication sub-information to efficiently replicate data to a second storage system using asynchronous replication technology, utilizing both available links to improve replication efficiency without increasing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single replication link is used to replicate data from production site or level-1 site to level-2 site, then the system structure is simple, but the replication efficiency is low and bandwidth bottlenecks occur
Solution Approach 1:
The patent segments the replication task by dividing it into multiple sub-tasks. Each sub-task is assigned to a different storage device (first storage device, second storage device, etc.) within the same storage system. Each storage device independently replicates data to the level-2 site through separate replication links, thereby utilizing multiple links simultaneously to improve replication efficiency and avoid bandwidth bottlenecks.
2Productivity
If multiple storage devices are used to replicate data simultaneously through multiple links, then the replication efficiency improves, but the resource consumption increases
Solution Approach 1:
The patent implements self-service by enabling each storage device to autonomously determine its own replication sub-information and execute replication independently. The storage devices self-coordinate through shared replication information without requiring centralized control, reducing control overhead and optimizing resource utilization. This allows the system to achieve high replication efficiency while minimizing unnecessary resource consumption.
3Reliability
If data is replicated from production site or level-1 site to level-2 site, then data backup is achieved, but the replication cost increases
Solution Approach 1:
The patent makes the replication system universal by enabling any storage device within the storage system to participate in replication to the level-2 site. The system can flexibly utilize available storage devices and links based on current resource availability, rather than relying on a fixed replication path. This multi-functionality allows the system to achieve reliable data backup while optimizing cost by using existing infrastructure resources.
Data Source
AI summary
A data replication method and a storage system are provided. The method is applied to a storage system including a first storage device and a second storage device. According to the method, after determining replication information, a first storage system determines a first replication sub-information and a second replication sub-information according to the replication information, where the replication information is used to indicate data that needs to be replicated by the first storage system to a second storage system in a current replication task. Then, the first storage device replicates data to the second storage system according to the second replication sub-information, and the second storage device replicates data to the second storage system according to the second replication sub-information.