github.com/matrixorigin/matrixone@v1.2.0/pkg/hakeeper/checkers/logservice/stats.go (about)

     1  // Copyright 2021 - 2022 Matrix Origin
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package logservice
    16  
    17  type replica struct {
    18  	uuid    string
    19  	shardID uint64
    20  	epoch   uint64
    21  
    22  	replicaID uint64
    23  }
    24  
    25  // stats collects all replicas that need to be processed.
    26  type stats struct {
    27  	// zombies collects replicas that are already removed in config but still
    28  	// running on log stores.
    29  	zombies []replica
    30  
    31  	// toStart collects replicas that are already added in config but
    32  	// not running on log stores.
    33  	toStart []replica
    34  
    35  	// toRemove collects replicas that needs to be removed in config.
    36  	// The key is shardID and the value is the slice of replicas.
    37  	toRemove map[uint64][]replica
    38  
    39  	// toAdd collects replicas that needs to be added in config.
    40  	// The key is shardID and the value is the number of replicas to be added.
    41  	toAdd map[uint64]uint32
    42  }
    43  
    44  func newStats() *stats {
    45  	return &stats{
    46  		toRemove: make(map[uint64][]replica),
    47  		toAdd:    make(map[uint64]uint32),
    48  	}
    49  }