tidb config 代码
文件路径：/store/pdtypes/config.go
/ Copyright 2022 PingCAP, Inc.
/
/ 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,
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/ See the License for the specific language governing permissions and
/ limitations under the License.
package pdtypes
/ ReplicationConfig is the replication configuration.
type ReplicationConfig struct {
/ MaxReplicas is the number of replicas for each region.
MaxReplicas uint64 `toml:"max-replicas" json:"max-replicas"`
/ The label keys specified the location of a store.
/ The placement priorities is implied by the order of label keys.
/ For example, ["zone", "rack"] means that we should place replicas to
/ different zones first, then to different racks if we don't have enough zones.
LocationLabels StringSlice `toml:"location-labels" json:"location-labels"`
/ StrictlyMatchLabel strictly checks if the label of TiKV is matched with LocationLabels.
StrictlyMatchLabel bool `toml:"strictly-match-label" json:"strictly-match-label,string"`
/ When PlacementRules feature is enabled. MaxReplicas, LocationLabels and IsolationLabels are not used any more.
EnablePlacementRules bool `toml:"enable-placement-rules" json:"enable-placement-rules,string"`
/ EnablePlacementRuleCache controls whether use cache during rule checker
EnablePlacementRulesCache bool `toml:"enable-placement-rules-cache" json:"enable-placement-rules-cache,string"`
/ IsolationLevel is used to isolate replicas explicitly and forcibly if it's not empty.
/ Its value must be empty or one of LocationLabels.
/ Example:
/ location-labels = ["zone", "rack", "host"]
/ isolation-level = "zone"
/ With configuration like above, PD ensure that all replicas be placed in different zones.
/ Even if a zone is down, PD will not try to make up replicas in other zone
/ because other zones already have replicas on it.
IsolationLevel string `toml:"isolation-level" json:"isolation-level"`
}