64 lines
1.7 KiB
Go
64 lines
1.7 KiB
Go
package server
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import (
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"math"
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"time"
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)
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type raftFollowersStats struct {
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Leader string `json:"leader"`
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Followers map[string]*raftFollowerStats `json:"followers"`
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}
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func NewRaftFollowersStats(name string) *raftFollowersStats {
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return &raftFollowersStats{
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Leader: name,
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Followers: make(map[string]*raftFollowerStats),
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}
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}
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type raftFollowerStats struct {
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Latency struct {
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Current float64 `json:"current"`
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Average float64 `json:"average"`
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averageSquare float64
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StandardDeviation float64 `json:"standardDeviation"`
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Minimum float64 `json:"minimum"`
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Maximum float64 `json:"maximum"`
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} `json:"latency"`
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Counts struct {
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Fail uint64 `json:"fail"`
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Success uint64 `json:"success"`
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} `json:"counts"`
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}
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// Succ function update the raftFollowerStats with a successful send
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func (ps *raftFollowerStats) Succ(d time.Duration) {
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total := float64(ps.Counts.Success) * ps.Latency.Average
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totalSquare := float64(ps.Counts.Success) * ps.Latency.averageSquare
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ps.Counts.Success++
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ps.Latency.Current = float64(d) / (1000000.0)
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if ps.Latency.Current > ps.Latency.Maximum {
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ps.Latency.Maximum = ps.Latency.Current
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}
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if ps.Latency.Current < ps.Latency.Minimum {
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ps.Latency.Minimum = ps.Latency.Current
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}
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ps.Latency.Average = (total + ps.Latency.Current) / float64(ps.Counts.Success)
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ps.Latency.averageSquare = (totalSquare + ps.Latency.Current*ps.Latency.Current) / float64(ps.Counts.Success)
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// sdv = sqrt(avg(x^2) - avg(x)^2)
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ps.Latency.StandardDeviation = math.Sqrt(ps.Latency.averageSquare - ps.Latency.Average*ps.Latency.Average)
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}
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// Fail function update the raftFollowerStats with a unsuccessful send
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func (ps *raftFollowerStats) Fail() {
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ps.Counts.Fail++
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}
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