Backup Metadata Checksum Validation for Low-IO Recovery
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Solution Overview
Problem
Existing backup and recovery validation processes consume significant computing resources and time due to the reliance on expensive physical IO operations, leading to inefficiencies in resource consumption and operation duration.
Innovation Solution
Leveraging file-system data integrity capabilities to convert expensive physical IO operations into low-cost metadata operations, utilizing checksums to efficiently validate backups and recoveries, thereby reducing resource consumption and operation time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional backup validation processes are used, then data integrity can be verified, but computing resources and time are significantly consumed due to extensive physical IO operations
Solution Approach 1:
The patent creates a metadata copy of the backup data that contains checksum information and structural details. Instead of validating the entire backup data through physical IO operations, the system validates this metadata copy, which consumes significantly fewer computing resources while still ensuring data integrity through checksum verification.
Solution Approach 2:
The patent extracts the essential validation information (checksums, metadata) from the backup data and stores it separately. This extraction allows the validation process to work only with the extracted metadata rather than the complete backup dataset, reducing the computational burden while maintaining verification reliability.
2Reliability
If traditional backup validation processes are used, then data integrity can be verified, but operation duration increases due to extensive physical IO operations
Solution Approach 1:
By creating and validating a metadata copy rather than the full backup data, the system dramatically reduces operation duration. The metadata structure contains only essential validation information (checksums, file descriptors), allowing rapid verification without the time-consuming physical IO operations required for complete data validation.
Solution Approach 2:
The patent performs partial validation by focusing only on the metadata portion of the backup data rather than the entire dataset. This partial action approach validates the critical structural integrity and checksum information while skipping redundant full-data reads, thereby reducing operation duration while maintaining sufficient verification reliability.
3Measurement precision
If extensive physical IO operations are performed for backup validation, then comprehensive data verification is achieved, but resource utilization increases
Solution Approach 1:
The system creates a lightweight metadata copy that captures the essential verification information needed for comprehensive data validation. This metadata copy includes checksums, file descriptors, and structural information that enable thorough verification without requiring intensive physical IO operations on the complete backup dataset, thus improving resource utilization efficiency.
Solution Approach 2:
The metadata structure serves as an intermediary between the backup data and the validation process. Instead of directly validating the entire backup data through resource-intensive operations, the system uses this intermediate metadata layer to perform verification, reducing the computational burden while maintaining verification comprehensiveness through checksum and structural validation.
Data Source
AI summary
A method for efficient backup and recovery validation includes receiving, as part of a backup operation for a host and at a backup storage, a backup copy from the host; retrieving a metadata database from the backup copy, where the metadata database includes a host checksum value based on a portion of the backup copy; parsing, using a backup agent, the metadata database by appending the metadata database with a backup checksum value based on the portion of the backup copy; making a first determination, using the backup agent, whether the portion of the backup copy is abnormal based on a comparison between the host checksum value and the backup checksum value; and appending, based on the first determination, the metadata database with a recoverable identifier to generate a recovery metadata database, where the recoverable identifier causes an adjustment to a recovery operation.