Tag
heartbeats
- Jul 11, 2025 Heartbeat Interval and Timeout Arithmetic for Fixed-Threshold Detectors How the choice of heartbeat period and missed-beat threshold sets false-positive rate, detection latency, and message volume at the same time, and why the tail of the delay distribution decides everything. distributed systems
- Apr 28, 2025 Hierarchical Heartbeat Aggregation and the Cost of Intermediate Levels Why a tree of monitors cuts liveness traffic from quadratic to linear, what the extra level adds to detection time, and how the aggregate view loses the identity of the observer. 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
- Mar 12, 2024 Visibility Timeouts and Lease Heartbeats in Job Claims Why a claimed job stays hidden from other workers only until a deadline, how heartbeats extend that deadline safely, and what happens when the worker is alive but cannot renew. backend systems
- Mar 15, 2022 Heartbeats, Leases, and the Timeout That Declares a Node Dead Why node liveness is a leased lease with a bounded renewal, how the kubelet's lease write differs from its status report, and what a false positive costs when the network partitions. virtualization