Tag
fencing-tokens
- Jul 29, 2026 Leader Leases and Fencing Tokens in Failover Why a demoted leader can still issue writes, how time-based leases bound that window, and why fencing tokens rather than timeouts are what actually protects shared storage. distributed systems
- Oct 21, 2025 Leader Failover: Detection Windows, Fencing, and Split-Brain Avoidance How a failed leader is detected, why a timeout cannot distinguish a dead leader from a slow one, and how fencing tokens stop two leaders from accepting writes. databases
- Jan 28, 2025 Fencing Tokens: Why a Lock Is Advisory Until the Resource Checks It How a monotonic token attached to a grant lets the protected resource reject a stale holder, and why no amount of clock discipline makes the check unnecessary. distributed systems
- May 14, 2024 Worker Leases, Heartbeats, and the Zombie Task Problem How a lease turns liveness into a deadline, why an expired lease cannot prove a task stopped, and how fencing tokens contain the overlap. data engineering
- Apr 14, 2022 Fencing Tokens and the Worker That Did Not Notice It Was Replaced How a monotonic lease epoch stored beside the protected data stops a stale worker from committing, why a timestamp cannot serve as the token, and what the guarantee excludes. backend systems