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/*
*
* Copyright 2023 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package weightedroundrobin
import (
iserviceconfig "google.golang.org/grpc/internal/serviceconfig"
"google.golang.org/grpc/serviceconfig"
)
type lbConfig struct {
serviceconfig.LoadBalancingConfig `json:"-"`
// Whether to enable out-of-band utilization reporting collection from the
// endpoints. By default, per-request utilization reporting is used.
EnableOOBLoadReport bool `json:"enableOobLoadReport,omitempty"`
// Load reporting interval to request from the server. Note that the
// server may not provide reports as frequently as the client requests.
// Used only when enable_oob_load_report is true. Default is 10 seconds.
OOBReportingPeriod iserviceconfig.Duration `json:"oobReportingPeriod,omitempty"`
// A given endpoint must report load metrics continuously for at least this
// long before the endpoint weight will be used. This avoids churn when
// the set of endpoint addresses changes. Takes effect both immediately
// after we establish a connection to an endpoint and after
// weight_expiration_period has caused us to stop using the most recent
// load metrics. Default is 10 seconds.
BlackoutPeriod iserviceconfig.Duration `json:"blackoutPeriod,omitempty"`
// If a given endpoint has not reported load metrics in this long,
// then we stop using the reported weight. This ensures that we do
// not continue to use very stale weights. Once we stop using a stale
// value, if we later start seeing fresh reports again, the
// blackout_period applies. Defaults to 3 minutes.
WeightExpirationPeriod iserviceconfig.Duration `json:"weightExpirationPeriod,omitempty"`
// How often endpoint weights are recalculated. Default is 1 second.
WeightUpdatePeriod iserviceconfig.Duration `json:"weightUpdatePeriod,omitempty"`
// The multiplier used to adjust endpoint weights with the error rate
// calculated as eps/qps. Default is 1.0.
ErrorUtilizationPenalty float64 `json:"errorUtilizationPenalty,omitempty"`
}
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