Application-Managed Fault Detection for Cross-Region Object Stores
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Solution Overview
Problem
Traditional storage systems face challenges in maintaining high availability and disaster recovery for cross-region replicated object stores, particularly during communications outages, where existing solutions often fail to ensure seamless data replication and fault handling across regions.
Innovation Solution
The implementation of application-managed fault handling and replication methods, which include specific flow charts and infrastructure management techniques to control cross-region replicated object stores, ensuring data integrity and availability through proactive data rebuilding and redundancy mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional storage systems use automatic replication mechanisms for cross-region data storage, then data redundancy is improved, but system complexity and difficulty in handling communication outages increase
Solution Approach 1:
The system enables self-service through automated fault detection and application-managed fault handling. The primary object store automatically detects faults and notifies the application, which then manages the fault handling process including initiating data rebuilding to the secondary object store, eliminating the need for complex manual intervention mechanisms
Solution Approach 2:
The system segments fault handling responsibilities between the storage system (automatic fault detection and notification) and the application layer (fault handling and data rebuilding). This segmentation simplifies each component's functionality while maintaining overall system reliability
2Reliability
If traditional storage systems implement cross-region replication, then disaster recovery capability is improved, but performance degradation during communications outages occurs
Solution Approach 1:
The system performs preliminary actions by pre-configuring secondary object stores in different geographic regions and pre-establishing replication capabilities. When communications outages occur, the system can immediately initiate data rebuilding to the secondary location without performance degradation, as the infrastructure is already in place
Solution Approach 2:
The system introduces an intermediary notification mechanism where the primary object store notifies the application of faults, which then coordinates the data rebuilding process. This intermediary approach allows the system to handle communications outages gracefully by separating the detection and execution phases of fault handling
3Reliability
If manual fault handling procedures are used in cross-region replicated object stores, then data integrity can be maintained, but response time and operational efficiency deteriorate
Solution Approach 1:
The system implements feedback mechanisms where the primary object store automatically detects faults and notifies the application, which then initiates data rebuilding to the secondary object store. This automated feedback loop ensures rapid response to faults while maintaining data integrity through application-managed fault handling procedures
Solution Approach 2:
The system performs preliminary setup by configuring secondary object stores and replication capabilities in advance. When faults occur, the pre-configured system can immediately execute data rebuilding operations without manual intervention, reducing fault response time while maintaining data integrity
4Reliability
If seamless data replication is implemented across regions, then high availability is improved, but system complexity and difficulty in managing communications outages increase
Solution Approach 1:
The system achieves self-service through automated fault detection by the primary object store and automatic notification to the application, which then manages the replication process. This eliminates the need for complex manual management of cross-region replication while maintaining high availability
Solution Approach 2:
The system segments replication management into automated components (fault detection and notification) and application-managed components (fault handling and data rebuilding). This segmentation simplifies the overall system complexity while maintaining seamless data replication across regions
Data Source
AI summary
Application-managed fault detection for cross-region replicated object stores is disclosed. An embodiment includes determining, by a first storage system among a plurality of storage systems replicating an object store, a faulted state in response to identifying a fault that prevents replication of updates to the object store to at least a second storage system of the plurality of storage systems; providing, through an API, an indication that the first storage system has entered the faulted state; and receiving a request indicating how to proceed in the presence of the fault.