Virtual Tape Library Inter-Library Data Sharing
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Solution Overview
Problem
Virtual tape libraries, such as the Disk Library for Mainframe (DLm), are typically closed systems, limiting access to virtual tapes across different libraries, and existing solutions do not effectively enable inter-library access or data sharing over a network, such as the cloud, for extended data storage solutions.
Innovation Solution
A method and system that allow virtual tape libraries to access and copy virtual tapes across different libraries over a secure network, enabling an extended tape library configuration where virtual tapes can be searched and copied between remote sites, using inter-library messages and secure protocols like Secure Copy, and implementing version management options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If virtual tape libraries operate as closed systems with local access only, then system reliability and data security are maintained, but data sharing and accessibility across different sites are limited
Solution Approach 1:
The patent introduces an intermediary system that manages virtual tape copying between separate virtual tape libraries. The intermediary coordinates the copying process, handles authentication, and ensures data integrity while maintaining the closed system architecture of individual libraries. This allows controlled data sharing without compromising the security and reliability of the underlying systems.
2Adaptability or versatility
If virtual tapes are copied between separate virtual tape libraries over a network, then data availability and accessibility are improved, but network security risks and system complexity increase
Solution Approach 1:
The patent segments the virtual tape library system into independent, modular units that can operate autonomously while participating in the extended library network. Each virtual tape library remains a distinct entity with its own management system, but they can collectively provide extended storage capabilities. This modular approach reduces overall system complexity while enabling inter-library access.
3Volume of stationary object
If virtual tapes are copied between remote sites over the cloud, then extended storage capacity and data accessibility are achieved, but data transfer time and network bandwidth consumption increase
Solution Approach 1:
The patent implements preliminary actions by pre-positioning virtual tape copies in appropriate locations based on anticipated access patterns. The system can proactively replicate frequently accessed virtual tapes to multiple sites before they are actually needed, reducing wait times when data is requested. This preliminary replication strategy balances storage capacity expansion with minimized data transfer delays.
Data Source
AI summary
In an embodiment, a method includes, responsive to a user request for a virtual tape from a first library operatively coupled to a first plurality of virtual tape storage devices sent to a second library operatively coupled to a second plurality of virtual tape storage devices, copying a virtual tape from the second plurality of virtual tape storage devices of the second library to the first plurality of virtual tape storage devices of the first library.