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partition_metrics.go
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partition_metrics.go
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// Copyright 2018 The Chubao 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 datanode
import "sync/atomic"
// DataPartitionMetrics defines the metrics related to the data partition
type DataPartitionMetrics struct {
WriteCnt uint64
ReadCnt uint64
TotalWriteLatency uint64
TotalReadLatency uint64
WriteLatency float64
ReadLatency float64
lastWriteLatency float64
lastReadLatency float64
}
// NewDataPartitionMetrics creates a new DataPartitionMetrics
func NewDataPartitionMetrics() *DataPartitionMetrics {
metrics := new(DataPartitionMetrics)
metrics.WriteCnt = 1
metrics.ReadCnt = 1
return metrics
}
// UpdateReadMetrics updates the read-related metrics
func (metrics *DataPartitionMetrics) UpdateReadMetrics(latency uint64) {
atomic.AddUint64(&metrics.ReadCnt, 1)
atomic.AddUint64(&metrics.TotalReadLatency, latency)
}
// UpdateWriteMetrics updates the write-related metrics
func (metrics *DataPartitionMetrics) UpdateWriteMetrics(latency uint64) {
atomic.AddUint64(&metrics.WriteCnt, 1)
atomic.AddUint64(&metrics.TotalWriteLatency, latency)
}
func (metrics *DataPartitionMetrics) recomputeLatency() {
metrics.ReadLatency = float64((atomic.LoadUint64(&metrics.TotalReadLatency)) / (atomic.LoadUint64(&metrics.ReadCnt)))
metrics.WriteLatency = float64((atomic.LoadUint64(&metrics.TotalWriteLatency)) / (atomic.LoadUint64(&metrics.WriteCnt)))
atomic.StoreUint64(&metrics.TotalReadLatency, 0)
atomic.StoreUint64(&metrics.TotalWriteLatency, 0)
atomic.StoreUint64(&metrics.WriteCnt, 1)
atomic.StoreUint64(&metrics.ReadCnt, 1)
}