Virtual Tape Server Self-Expiring Data Processing
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Solution Overview
Problem
Current virtual tape storage systems require significant resources and time for return-to-scratch processing, which is primarily handled by host software, leading to performance impacts on the host and tape storage servers.
Innovation Solution
Shift the bulk of return-to-scratch processing to the virtual tape server by defining volume expiration attributes on the host and performing processing directly on the virtual tape server, eliminating the need for host queries and reducing resource consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If return-to-scratch processing is handled by host software, then processing can be performed, but CPU and memory usage on the host increases significantly
Solution Approach 1:
The patent extracts the return-to-scratch processing function from the host software and relocates it to the virtual tape server. The host software no longer performs this processing, instead sending expiration attributes to the virtual tape server which then autonomously identifies and processes expired volumes, converting them to scratch status without requiring host queries or resources.
Solution Approach 2:
The virtual tape server is empowered to autonomously perform return-to-scratch processing using expiration attributes received from the host. The system self-identifies expired volumes, self-processes the conversion to scratch status, and self-manages the entire workflow without requiring continuous host intervention or resource allocation.
2Productivity
If return-to-scratch processing is performed by host software, then volumes can be converted to scratch, but processing time increases
Solution Approach 1:
The host software performs preliminary action by sending expiration attributes to the virtual tape server in advance. This allows the virtual tape server to begin autonomous processing of expired volumes without waiting for host queries, significantly reducing the overall processing time for converting volumes to scratch status.
3Productivity
If return-to-scratch processing is handled by host software, then processing can be completed, but resource contention between host and tape storage server increases
Solution Approach 1:
The patent extracts the processing workload from the host system and relocates it entirely to the virtual tape server. This eliminates the resource contention that occurs when both the host and tape storage server are involved in the same processing operations, as the host now only sends expiration attributes while the virtual tape server handles all subsequent processing independently.
Data Source
AI summary
Embodiments for managing data in a virtual tape storage environment, by a processor device, are provided. A management system on a host is used to define volume expiration attributes for virtual tape volumes and the volume expiration attributes are forwarded to a virtual tape server. Return-to-scratch processing is performed on the virtual tape volumes directly on the virtual tape server by using the volume expiration attributes to compile candidate volumes without querying the host, where the candidate volumes are expired and converted to scratch by the virtual tape server.