Endapoolset

Endapoolset is a term used in distributed systems to denote a managed collection of service endpoints. Each endpoint typically represents a network address such as host:port that can service client requests. The endapoolset is designed to be dynamic: endpoints can be added or removed as service instances scale, and health information can be used to influence routing decisions. It is commonly implemented by client libraries, service meshes, or load balancers and is refreshed through service discovery, configuration updates, or polling.

Structure and characteristics

An endapoolset consists of a set of endpoint entries, each with attributes such as address, health status, weight or priority, region or zone, version, and last health check timestamp. Health status can reflect liveness, readiness, and responsiveness, and may be derived from active probes, telemetry, or external health checks. Weighting and metadata allow operators to influence how traffic is distributed among endpoints and to distinguish between different deployment targets.

Management and operations

Typical operations include adding and removing endpoints, updating endpoint metadata, recording health outcomes, and refreshing the pool from a discovery service. Common retrieval methods select an endpoint for routing based on strategies such as round-robin, weighted round-robin, least connections, random with weights, or consistent hashing. The endapoolset supports filters (for region, version, or protocol) and can expose health or utilization metrics for observability.

Applications and context

Endapoolset is used by load balancers, API gateways, service meshes, and client-side libraries to achieve resiliency and scalable traffic distribution. It often overlaps with related concepts like endpoint pools and server pools, and the terminology may vary across platforms. While not universally standardized, the endapoolset remains a practical model for managing dynamic sets of service endpoints in modern distributed architectures.