66 lines
2.7 KiB
Go
66 lines
2.7 KiB
Go
// Copyright 2017 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package clientv3
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import (
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"math"
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"time"
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"google.golang.org/grpc"
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)
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var (
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// client-side handling retrying of request failures where data was not written to the wire or
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// where server indicates it did not process the data. gRPC default is default is "FailFast(true)"
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// but for etcd we default to "FailFast(false)" to minimize client request error responses due to
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// transient failures.
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defaultFailFast = grpc.FailFast(false)
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// client-side request send limit, gRPC default is math.MaxInt32
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// Make sure that "client-side send limit < server-side default send/recv limit"
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// Same value as "embed.DefaultMaxRequestBytes" plus gRPC overhead bytes
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defaultMaxCallSendMsgSize = grpc.MaxCallSendMsgSize(2 * 1024 * 1024)
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// client-side response receive limit, gRPC default is 4MB
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// Make sure that "client-side receive limit >= server-side default send/recv limit"
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// because range response can easily exceed request send limits
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// Default to math.MaxInt32; writes exceeding server-side send limit fails anyway
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defaultMaxCallRecvMsgSize = grpc.MaxCallRecvMsgSize(math.MaxInt32)
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// client-side non-streaming retry limit, only applied to requests where server responds with
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// a error code clearly indicating it was unable to process the request such as codes.Unavailable.
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// If set to 0, retry is disabled.
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defaultUnaryMaxRetries uint = 100
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// client-side streaming retry limit, only applied to requests where server responds with
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// a error code clearly indicating it was unable to process the request such as codes.Unavailable.
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// If set to 0, retry is disabled.
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defaultStreamMaxRetries = uint(^uint(0)) // max uint
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// client-side retry backoff wait between requests.
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defaultBackoffWaitBetween = 25 * time.Millisecond
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// client-side retry backoff default jitter fraction.
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defaultBackoffJitterFraction = 0.10
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)
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// defaultCallOpts defines a list of default "gRPC.CallOption".
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// Some options are exposed to "clientv3.Config".
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// Defaults will be overridden by the settings in "clientv3.Config".
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var defaultCallOpts = []grpc.CallOption{defaultFailFast, defaultMaxCallSendMsgSize, defaultMaxCallRecvMsgSize}
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// MaxLeaseTTL is the maximum lease TTL value
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const MaxLeaseTTL = 9000000000
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