Consistent Hashing | System Design | High Level Design

Welcome to an in-depth guide on consistent hashing in system design!
Join me as I explore this essential technique for efficiently distributing data across servers in a dynamic environment. This video provides a comprehensive overview of consistent hashing, explaining its importance, mechanisms, and benefits. In upcoming episodes, I'll delve deeper into each aspect, offering practical examples and tackling common interview questions step by step.
Consistent hashing is a crucial strategy for managing distributed systems, especially when the number of servers can change frequently due to scaling or failures. It helps ensure that data is evenly distributed and easily retrievable, even as servers are added or removed.
What is Consistent Hashing?
Consistent hashing is a technique used to distribute data across a cluster of servers in such a way that minimizes the amount of data that needs to be moved when servers join or leave the cluster. Unlike traditional hashing, which can lead to significant data movement when the number of servers changes, consistent hashing aims to keep this movement minimal, providing a more stable and efficient system.
Benefits of Consistent Hashing
Minimal Data Movement: When servers join or leave, only a small portion of the data needs to be reassigned, reducing the overhead and ensuring faster stabilization.
Scalability: Easily add or remove servers without significantly disrupting the system, making it highly scalable for dynamic environments.
Load Balancing: Distributes data evenly across servers, preventing any single server from becoming a bottleneck and ensuring efficient resource utilization.
Fault Tolerance: Provides robust fault tolerance by redistributing the load among remaining servers when a server fails, ensuring continuous availability.
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