Virtual Tape Library Non-Disruptive Reconfiguration via Segmentation
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Solution Overview
Problem
The existing configuration of virtual tape drives and libraries for mainframe applications requires disruptive processes, including server restarts, making non-disruptive removal and reconfiguration challenging.
Innovation Solution
The introduction of additional computer processes, including a virtual tape solution with an API and virtual tape engines, allows for the non-disruptive removal and reconfiguration of virtual tape libraries by managing tape drives and libraries without shutting down the host application, using drive and library control tables to track and manage emulated tape resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If virtual tape libraries are removed or reconfigured using traditional methods, then the configuration changes can be made, but the host application must be shut down and restarted causing disruption
Solution Approach 1:
The system segments the virtual tape library management into independent components: the host application, the virtualization layer, and the physical tape library. This allows configuration changes to be made in the virtualization layer without affecting the host application, enabling non-disruptive removal and reconfiguration of virtual tape libraries.
Solution Approach 2:
The patent introduces a virtualization layer as an intermediary between the host application and the physical tape library. This intermediary layer abstracts the tape library resources, allowing the host application to continue operating while the virtual tape library configuration is modified, removed, or reconfigured without requiring application shutdown.
2Adaptability or versatility
If the host application is restarted to reconfigure virtual tape libraries, then the configuration can be updated, but downtime and operational disruption occur
Solution Approach 1:
The virtualization layer enables continuous operation of the host application while configuration changes are made to virtual tape libraries. The useful action of data processing and tape library management continues uninterrupted, as configuration updates occur in the virtualization layer without requiring host application restarts.
3Device complexity
If traditional tape library management is used, then simplicity is maintained, but disruptive server restarts are required for any configuration changes
Solution Approach 1:
The virtualization layer serves multiple functions: it manages virtual tape library configurations, enables non-disruptive removal and reconfiguration, provides resource abstraction, and maintains operational continuity. This multi-functional approach consolidates complexity in the virtualization layer while maintaining simplicity and productivity at the host application level.
Data Source
AI summary
A mechanism for non-disruptive virtual tape libraries removal and reconfiguration. Specifically, the introduction of various additional computer processes permit the removal and reconfiguration of a virtual tape library without requiring the shutdown and re-initialization of the host application on which the virtual tape library resides.