Checkpoint Zone Operation for Spare Persistent Storage
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Solution Overview
Problem
The existing methods for managing data in computing devices are inefficient in handling persistent storage device failures, leading to performance impacts and inefficiencies in data recovery processes.
Innovation Solution
A method and system that utilize checkpoint metadata and slice metadata to proactively copy data from potentially failing persistent storage devices to a spare device, enabling efficient rebuilding of data upon failure with minimal impact on overall performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is copied from persistent storage devices to a spare device proactively, then data reliability is improved, but computing resources and performance are impacted
Solution Approach 1:
The system proactively copies data from persistent storage devices to a spare storage device before actual failure occurs. This preliminary action ensures that when a storage device fails, the data is already available on the spare device, eliminating the need for time-consuming reconstruction operations and maintaining both high reliability and performance.
Solution Approach 2:
The patent implements a copying mechanism where data is replicated from primary persistent storage devices to a spare storage device. This creates redundant copies that can be immediately used if the original device fails, resolving the contradiction by having pre-prepared copies rather than generating them during failure events.
2Reliability
If data reconstruction is performed after persistent storage device failure, then data reliability is restored, but time and computational resources are consumed
Solution Approach 1:
Instead of performing data reconstruction after failure, the system proactively copies data to spare devices before failure occurs. This preliminary action eliminates the time-consuming reconstruction process entirely, as data is already available on spare devices when needed.
Solution Approach 2:
The patent skips the traditional time-consuming data reconstruction process by using pre-copied data on spare devices. When a storage device fails, the system immediately uses the already-copied data from the spare device, rushing through the recovery process by eliminating the reconstruction step.
3Reliability
If computing resources are used to generate backups, then data protection is improved, but overall performance of computing resources is impacted
Solution Approach 1:
The system performs backup operations proactively during normal operating conditions rather than during failure events. This preliminary action allows backup processes to be distributed over time and managed without interfering with critical recovery operations, balancing data protection with performance.
Solution Approach 2:
The patent implements a self-service backup mechanism where the storage system automatically manages data copying to spare devices without requiring external intervention or consuming excessive computing resources during critical operations. The system services its own backup needs independently.
Data Source
AI summary
In general, the invention relates to a method for managing data. The method includes detecting a persistent storage device failure in a persistent storage device of a plurality of persistent storage devices, and in response to the detecting, initiating a rebuilding of data in a spare persistent storage device using checkpoint metadata and slice metadata, wherein the data is a copy of data that was stored in the persistent storage device and wherein the spare persistent storage device is not one of the plurality of persistent storage device.