A pool represents a group of members over which the load balancing will be applied.
Algorithm:
The load balancer algorithm that distributes traffic to the pool members.
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LEAST_CONNECTIONS: Allocates requests to the instance with the least number of active
connections.
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ROUND_ROBIN: Rotates requests evenly between multiple instances.
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SOURCE_IP: Requests from a unique source IP address are consistently directed to the same instance.
Protocol:
The protocol for which this pool and its members listen. A valid value is HTTP, HTTPS, PROXY, or TCP.
Session Persistence:
The type of session persistence for distributing traffic to the pool members.
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SOURCE_IP: Session persistence based on source ip.
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HTTP_COOKIE: Session persistence based on http cookie.
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APP_COOKIE: Session persistence based on application cookie.