File System Snapshot Restoration via Namespace Redirection
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Solution Overview
Problem
File system snapshot-based data backup and restoration processes are time-consuming and involve intensive I/O operations, leading to increased overhead, especially for large file systems with high volumes of digital information.
Innovation Solution
The improved snapshot restoration code decouples the restoration of file system objects by correlating the file system namespace with a read-only snapshot namespace, deferring individual object restoration to a first write operation, and freezing the file system during initial operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional file system snapshot restoration is performed, then data backup and restoration are achieved, but the process is time-consuming and involves intensive I/O operations increasing overhead
Solution Approach 1:
The patent performs preliminary actions by creating file system snapshots at specific points in time before disasters occur. These snapshots capture the hierarchy of files, directories, and metadata in advance, enabling rapid restoration without time-consuming data collection during the restoration process itself.
Solution Approach 2:
The patent creates copies of the file system state through snapshots. Instead of restoring data from original sources during disaster recovery, the system uses pre-created snapshot copies that can be quickly restored, significantly reducing restoration time while maintaining data integrity.
2Reliability
If traditional file system snapshot restoration is performed, then data backup and restoration are achieved, but intensive I/O operations increase overhead
Solution Approach 1:
The patent uses snapshot copies to avoid intensive I/O operations during restoration. By maintaining snapshot copies of the file system state, the system eliminates the need for complex I/O operations that would otherwise be required to collect and restore data from multiple sources, thereby reducing overhead.
3Loss of information
If file system snapshots are used for data backup, then multiple historical versions are stored, but restoration downtime increases
Solution Approach 1:
The patent performs preliminary actions by capturing file system snapshots at periodic intervals before disasters occur. This preliminary data collection and organization enables rapid restoration operations, minimizing downtime while maintaining comprehensive data protection across multiple historical versions.
Solution Approach 2:
The patent uses snapshot copies to enable rapid restoration. Instead of recovering data from original sources during disaster recovery, the system restores from pre-created snapshot copies, dramatically reducing restoration downtime while maintaining data protection across multiple historical versions.
Data Source
AI summary
Snapshot restoration based on a correlation of a snapshot namespace with a file system namespace is provided. A restore command is received, following which the correlation between the file system namespace of the file system with the snapshot namespace of a snapshot of the file system is performed. Further a file operation command is received to perform at least one of a read file operation and a lookup file operation, corresponding to at least one object associated with the file system namespace of the file system. Further, based on restoration data associated with the at least one object, a redirection operation is executed for at least one of the read file operation and the lookup file operation. The redirection operation routes the file operation command to at least one respective snapshot object associated with the snapshot namespace, corresponding to the at least one object.