Welcome to a concise guide on Fencing Tokens in system design!
Join me as I explore this essential mechanism for ensuring safety and consistency in distributed systems.
What are Fencing Tokens?
Fencing Tokens are unique identifiers issued by a central authority to manage access and ensure the correctness of operations in distributed systems. They are used to prevent stale or out-of-order operations from causing inconsistencies, especially in scenarios involving distributed locks and leader election.
Benefits of Fencing Tokens
Consistency: Ensures that only the most recent and valid operations are performed, maintaining data consistency.
Simplicity: Provides a straightforward mechanism for managing access and ensuring correctness in distributed systems.
Fault Tolerance: Helps manage scenarios where nodes may fail or network partitions occur, ensuring that only valid operations proceed.
Use Cases
Transaction Management: Ensures that only valid, current transactions are processed in distributed databases.
Concurrency Control: Manages concurrent access to shared resources, preventing race conditions and ensuring consistency.
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