pub unsafe extern "C" fn cass_execution_profile_set_latency_aware_routing_settings(
profile: *mut CassExecProfile,
exclusion_threshold: cass_double_t,
scale_ms: cass_uint64_t,
retry_period_ms: cass_uint64_t,
update_rate_ms: cass_uint64_t,
min_measured: cass_uint64_t
) -> CassErrorExpand description
Configures the execution profile’s settings for latency-aware request routing.
Note: Execution profiles use the cluster-level load balancing policy unless enabled. This setting is not applicable unless a load balancing policy is enabled on the execution profile.
Defaults:
- exclusion_threshold: 2.0
- scale_ms: 100 milliseconds
- retry_period_ms: 10,000 milliseconds (10 seconds)
- update_rate_ms: 100 milliseconds
- min_measured: 50
@public @memberof CassExecProfile
@param[in] profile @param[in] exclusion_threshold Controls how much worse the latency must be compared to the average latency of the best performing node before it penalized. @param[in] scale_ms Controls the weight given to older latencies when calculating the average latency of a node. A bigger scale will give more weight to older latency measurements. @param[in] retry_period_ms The amount of time a node is penalized by the policy before being given a second chance when the current average latency exceeds the calculated threshold (exclusion_threshold * best_average_latency). @param[in] update_rate_ms The rate at which the best average latency is recomputed. @param[in] min_measured The minimum number of measurements per-host required to be considered by the policy. @return CASS_OK if successful, otherwise an error occurred.
@see cass_cluster_set_latency_aware_routing_settings()