Comprehensive and Detailed Explanation From Exact Extract:
Aheartbeat networkis a common technique used in HA clusters to continuously monitor the health and availability of cluster nodes. It allows nodes to detect failures and coordinate failover actions, thus preventing split-brain scenarios where multiple nodes believe they are active simultaneously, causing data corruption or conflicts. Manual failover, load balancers, or data replication alone do not prevent split-brain without this monitoring mechanism.
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