Versioned Hash Ring Resource Distribution
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Solution Overview
Problem
In large distributed computing systems, managing customer access to computing resources while maintaining system efficiency and security becomes increasingly challenging as complexity and usage grow, particularly due to changes in customer utilization patterns, which can lead to inefficiencies and resource misallocation.
Innovation Solution
The implementation of a hash ring system that uses immutable hash rings to route customer requests to appropriate computing resources, allowing for seamless transitions and state information transfer between worker managers, thereby reducing the impact of topology changes and improving resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the system modifies worker managers to address changing customer utilization patterns, then resource allocation efficiency improves, but system stability and customer service continuity deteriorate
Solution Approach 1:
The system performs preliminary actions by creating a new worker manager before modifying or removing existing ones. The hash ring is updated to include the new worker manager's range, and state information is proactively transferred from the departing worker manager to the new one, ensuring no service interruption occurs during the transition
Solution Approach 2:
The system implements beforehand cushioning by maintaining multiple worker managers concurrently during transitions. The departing worker manager continues to handle requests while the new one is being set up and state information is being transferred, providing a buffer that prevents service disruption
2Productivity
If the system uses traditional dynamic hash ring updates, then resource utilization improves, but customer latency increases due to redistribution overhead
Solution Approach 1:
The system applies local quality by making the hash ring partially dynamic rather than fully dynamic. Most of the hash ring remains static with fixed worker manager assignments, while only small localized portions are modified during updates. This minimizes the scope of redistribution and reduces customer latency
Solution Approach 2:
The hash ring is segmented into multiple independent ranges, each managed by a separate worker manager. This segmentation allows updates to be performed on individual segments without affecting the entire system, enabling continuous operation with minimal latency impact
3Reliability
If the system implements comprehensive state information transfer, then service continuity improves, but system complexity increases
Solution Approach 1:
The system extracts and transfers only the essential state information that is necessary for service continuity, rather than transferring all possible state data. This selective extraction maintains service continuity while avoiding the complexity of managing and transferring comprehensive state information
Solution Approach 2:
The system creates a copy of the necessary state information from the departing worker manager and transfers it to the new worker manager. This copying mechanism ensures service continuity through simple data replication rather than complex state synchronization protocols
Data Source
AI summary
A hash ring is used to determine and deploy configurations for a computer system for servicing customer requests. A worker manager managing a set of worker computing systems is deployed and associated with the hash ring. Various aspects of the computer system may be implemented according to configuration information for one or more attributes. Predecessor information is determined and used to obtain state information in connection with the configuration information.