This policy will try to calculate a token to find replica nodes in which queried data is stored.
After finding the replicas it performs a round robin on them.
To use this policy in Session:
use scylla::{Session, SessionBuilder};
use scylla::transport::load_balancing::{RoundRobinPolicy, TokenAwarePolicy};
use std::sync::Arc;
let robin = Box::new(RoundRobinPolicy::new());
let policy = Arc::new(TokenAwarePolicy::new(robin));
let session: Session = SessionBuilder::new()
.known_node("127.0.0.1:9042")
.load_balancing(policy)
.build()
.await?;
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