Information Recording Device Primary Backup Storage
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Solution Overview
Problem
In existing backup systems, the long time required for data file backups necessitates stopping data updates or additions, which can lead to prolonged downtime and disruptions for data writing requests, especially when using remote or low-speed storage devices.
Innovation Solution
The proposed information recording device includes a primary backup storage for high-speed backup and a backup copy unit that transfers the primary backup to a secondary backup storage while allowing data updates to resume immediately after the primary backup is complete, thus minimizing downtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If data backup is performed using a remote storage device or low-speed storage device, then backup capacity is increased, but backup time is prolonged and data writing requests are disrupted for longer periods
Solution Approach 1:
The backup process is divided into two independent stages: first, data is backed up to a temporary storage device (fast backup); second, data is transferred from temporary storage to the final backup destination (remote/low-speed storage). This segmentation allows the fast backup phase to complete quickly, minimizing data writing stop time, while the slower transfer phase occurs independently without blocking data operations.
Solution Approach 2:
A temporary storage device acts as an intermediary between the data storage and the remote/low-speed backup storage. Data flows through this intermediary: Data Storage → Temporary Storage (fast) → Backup Storage (slow). This intermediary enables the system to achieve both fast initial backup and eventual remote storage without the slow transfer speed affecting the minimization of data writing disruptions.
2Reliability
If data update is stopped during backup to ensure backup file coherency, then backup reliability is improved, but data writing productivity is reduced
Solution Approach 1:
The system performs a preliminary fast backup to temporary storage before the slow transfer to final backup storage. This preliminary action captures the data state at a specific point in time, ensuring coherency for that snapshot. Subsequent fast transfers from temporary storage maintain this coherency while allowing continuous data writing to the original storage, thus preserving both reliability and productivity.
3Volume of stationary object
If backup is performed to remote storage directly, then backup capacity is increased, but backup speed is reduced
Solution Approach 1:
The backup operation is segmented into a fast initial backup phase to temporary storage and a subsequent transfer phase to remote storage. The segmentation allows the critical speed-sensitive operation (initial backup) to use fast storage, while the capacity-sensitive operation (final storage) uses remote storage, optimizing both speed and capacity without compromise.
Solution Approach 2:
The system performs a preliminary backup to fast temporary storage before the slow transfer to remote storage. This preliminary action ensures that a usable backup is created quickly, and the subsequent slow transfer to remote storage does not impact the overall backup speed perception, as the critical backup function is already accomplished.
Data Source
AI summary
An information recording device (2) comprising a data storage (221), an information recording unit (211) for recording information from a data storage apparatus (1A), and a primary backup storage (222) in which information recorded to the data storage is backed up. In order to shorten the time at which data updates, etc., in the data storage are halted when backing up the data storage that stores information from the apparatus, the backup is carried out in the primary backup storage while data updates are kept halted by the information recording unit, and the information recording unit restarts writing to the data storage when the backup in the primary backup storage is complete and deletes the information recorded to the primary backup storage when the backup to the backup storage (3) of information recorded to the primary backup storage is complete.