what the hostScore used for in grpc_resolver?

[zdyj3170101136]

jaeger implement itself's grpc resolver in https://github.com/jaegertracing/jaeger/blob/v1.46.0/pkg/discovery/grpcresolver/grpc_resolver.go.

the func rendezvousHash is very strange, could you explain what is the meaning?

https://github.com/jaegertracing/jaeger/blob/v1.46.0/pkg/discovery/grpcresolver/grpc_resolver.go#L129C20-L129C34

[dosubot[bot]]

Hey @zdyj3170101136! 👋 I'm here to help you with any bugs, questions, or contributions you have. Let's squash those bugs together!

The hostScore in Jaeger's grpc_resolver is used to associate each host address with a score, which is part of the rendezvous hashing algorithm. This algorithm helps in selecting a subset of hosts from a larger list, which is useful for load balancing and fault tolerance. The rendezvousHash function assigns a hash score to each address using a combination of the address and a random salt, sorts the addresses by these scores, and returns the top N addresses based on the discoveryMinPeers parameter ^[1].

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