Storage Data Migration Status Replication
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Solution Overview
Problem
Conventional remote copy techniques for storage systems fail to efficiently migrate information about the data transfer status from a source storage to a destination storage, leading to inconvenient data management across multiple storage systems.
Innovation Solution
A storage apparatus and computer-readable medium that include a data transfer controller, a data transfer status managing information generator, and a data migration controller to manage and transfer data between multiple storage units, ensuring accurate migration of data transfer status information across connected storage systems via a network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional remote copy techniques are used to transfer data between storage systems, then data replication is achieved, but information about the data transfer status from source to backup storage is not migrated to the destination storage system
Solution Approach 1:
The system generates and transfers data transfer status managing information from the source storage system to the destination storage system in advance, before actual data migration occurs. This preliminary transfer of status information ensures that the destination system has complete knowledge of the data transfer state, enabling reliable status tracking without loss of information.
Solution Approach 2:
A data transfer status managing information structure is introduced as an intermediary element that carries status information between storage systems. This intermediary contains fields for tracking data transfer status, source and destination storage identifiers, and other relevant metadata, allowing seamless information transfer without direct complex interactions between storage systems.
2Ease of operation
If data is migrated between multiple storage systems without transferring status information, then device complexity is reduced, but data management convenience deteriorates
Solution Approach 1:
The data transfer status managing information is segmented into distinct fields including source storage identifier, destination storage identifier, data transfer status, and other metadata. This segmentation allows the status information to be processed, stored, and transferred independently from the actual data, simplifying the overall system architecture while improving data management convenience.
Solution Approach 2:
Instead of transferring complex control logic or establishing intricate relationships between storage systems, the invention creates a simplified copy of the essential status information and transfers it to the destination system. This copying approach maintains ease of operation by providing complete status knowledge at the destination without increasing device complexity.
Data Source
AI summary
By generating second data transfer status managing information for managing a data transfer status between the first storing unit and a third storing unit provided in the second storage apparatus, and third data transfer status managing information for managing data transfer status between the second storing unit and a fourth storing unit provided in the second storage apparatus based on the first data transfer status managing information; and transferring data between the first storing unit and the third storing unit based on the second data transfer status managing information, transferring data between the second storing unit and the fourth storing unit based on the third data transfer status managing information, and transferring the first data transfer status managing information, the data transfer status between multiple storing units in a migrating storage apparatus may be reproduced in another migrated storage apparatus.