Heartbeats
Configuring active heartbeat checks and cluster timeouts to identify node deaths and coordinate failovers.
What you'll learn
- Ping/Pong
- Failover Trigger
- False Positives
TL;DR
Configuring active heartbeat checks and cluster timeouts to identify node deaths and coordinate failovers.
Concept Overview
Heartbeats are periodic, lightweight signals sent between distributed machines to announce their operational health status, enabling active nodes to monitor cluster members and trigger failovers when crashes occur.
Key Architectural Pillars
Ping/Pong
The active query-response mechanism where a monitor queries a server and expects an immediate confirmation.
Failover Trigger
The decision threshold. If heartbeats are missed for a consecutive duration, the node is declared dead.
False Positives
Wrongly marking a healthy server as dead due to network delays or slow garbage collection cycles.