cDVR Media Storage Using Metadata-Guided Deletion
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Solution Overview
Problem
Conventional cloud-enabled digital video recording (cDVR) systems are cumbersome and resource-intensive due to the use of multiple distinct storage systems for managing media objects, leading to high storage and processing requirements and excessive metadata utilization.
Innovation Solution
A single storage system is employed in the cDVR system that selectively removes media objects not associated with recording requests while maintaining those associated with requests, using metadata updates to manage storage efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is stored in multiple locations across different devices, then data redundancy and security are improved, but data consistency and synchronization become more difficult to maintain
Solution Approach 1:
The system implements feedback mechanisms where devices report their data state to the cloud service, which then coordinates updates across all devices. This feedback loop ensures that when data is modified on one device, the changes are propagated to other devices, maintaining consistency while allowing distributed storage for security.
Solution Approach 2:
The cloud service acts as an intermediary between distributed devices, managing data synchronization without requiring direct peer-to-peer communication. This mediator coordinates data updates, resolves conflicts, and ensures consistency across the distributed network while maintaining data security through encrypted transmission and storage.
2Adaptability or versatility
If cloud services are used for data storage and management, then device functionality and user access are improved, but dependency on external services and potential security vulnerabilities increase
Solution Approach 1:
The system implements local quality by encrypting data both in the cloud and locally on devices, creating different security zones. Sensitive operations are performed locally rather than requiring cloud communication, reducing the attack surface while maintaining accessibility. This allows the system to leverage cloud services for convenience while mitigating security risks through localized security measures.
3Reliability
If automatic backup and synchronization features are implemented, then data loss prevention is improved, but system resources and energy consumption increase
Solution Approach 1:
Instead of continuous synchronization, the system uses periodic action by implementing event-driven updates that only trigger when data changes occur. This reduces energy consumption by avoiding unnecessary communication and processing while still preventing data loss through automatic backup at meaningful intervals and upon user actions.
Solution Approach 2:
The system implements selective synchronization by identifying and transmitting only the specific data blocks that have changed, rather than synchronizing entire datasets. This reduces energy consumption and network usage while maintaining data integrity, as only necessary data is transferred and updated across devices.
Data Source
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AI summary
A method includes storing a first plurality of media objects correspondingly associated with a plurality of metadata objects, each media object including a respective plurality of sequential media segments. The method includes receiving a recording request that is associated with a first one of the first plurality of media objects, and, responsive thereto, updating a metadata object corresponding to the first one of the first plurality of media objects to indicate the recording request. The method includes identifying a portion of the first plurality of media objects, not including the first one of the plurality of metadata objects, that satisfies a deletion criterion. The method includes removing the portion of the first plurality of media objects while maintaining the first one of the first plurality of media objects. The method includes storing a second plurality of media objects and the first one of the first plurality of media objects.