Virtual Tape Replication with Independent Retention Policies
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Solution Overview
Problem
Current data replication systems in storage devices require strict identity between local and remote virtual libraries for automigration, limiting the ability to set different retention times for backup data, and existing backup applications lack the necessary APIs to manage independent retention policies.
Innovation Solution
Implementing an automatic tape recycling system between local and remote virtual libraries, allowing for independent retention times and barcode management, enabling replication and recycling operations without direct integration with backup applications, and utilizing deduplication to optimize storage capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If strict identity between local and remote libraries is implemented for automigration, then data replication reliability is improved, but retention time flexibility deteriorates
Solution Approach 1:
The system segments the tape identity management by introducing virtual barcodes that can differ between local and remote libraries while maintaining a mapping relationship. This allows each library to have independent retention policies while the automigration system tracks correspondences through the barcode mapping table, resolving the contradiction between strict identity requirements and retention flexibility.
Solution Approach 2:
A barcode mapping table acts as an intermediary between local and remote library barcode systems. This mapping table stores correspondence relationships between local barcodes and remote barcodes, enabling the system to maintain strict identity for replication purposes while allowing different retention times through independent barcode management at each location.
2Adaptability or versatility
If out-of-band API is implemented to allow independent tape management, then retention policy flexibility is improved, but device complexity deteriorates
Solution Approach 1:
Instead of implementing complex out-of-band API integrations with backup applications, the system creates a virtual copy of tape identity through barcode mapping. The automigration system independently manages barcode correspondences between local and remote libraries without requiring modifications to backup applications, thus achieving retention flexibility while avoiding the complexity of deep system integration.
3Productivity
If automatic tape recycling is implemented with different retention times, then storage efficiency is improved, but operational complexity deteriorates
Solution Approach 1:
The system implements self-service automatic tape recycling through the barcode mapping table that automatically tracks which tapes have been migrated and can be recycled. When a tape is migrated from local to remote library, the mapping table updates automatically, enabling the system to self-manage retention periods and recycling schedules without complex operational intervention, thus improving storage efficiency while maintaining ease of operation.
Data Source
AI summary
Systems and methods of enhanced virtual storage replication are disclosed. An exemplary method comprises moving a virtual tape from a local virtual library to a remote virtual library. The method also comprises ejecting the virtual tape moved to the remote virtual library. The method also comprises recycling the ejected virtual tape at the local virtual library based on a remote retention policy.