/
nats-bench.go
146 lines (117 loc) · 3.33 KB
/
nats-bench.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
// Copyright 2015 Apcera Inc. All rights reserved.
package main
import (
"flag"
"fmt"
"io/ioutil"
"log"
"strings"
"sync"
"time"
"github.com/nats-io/nats"
"github.com/nats-io/nats/bench"
)
// Some sane defaults
const (
DefaultNumMsgs = 100000
DefaultNumPubs = 1
DefaultNumSubs = 0
DefaultMessageSize = 128
)
func usage() {
log.Fatalf("Usage: nats-bench [-s server (%s)] [--tls] [-np NUM_PUBLISHERS] [-ns NUM_SUBSCRIBERS] [-n NUM_MSGS] [-ms MESSAGE_SIZE] [-csv csvfile] <subject>\n", nats.DefaultURL)
}
var benchmark *bench.Benchmark
func main() {
var urls = flag.String("s", nats.DefaultURL, "The nats server URLs (separated by comma)")
var tls = flag.Bool("tls", false, "Use TLS Secure Connection")
var numPubs = flag.Int("np", DefaultNumPubs, "Number of Concurrent Publishers")
var numSubs = flag.Int("ns", DefaultNumSubs, "Number of Concurrent Subscribers")
var numMsgs = flag.Int("n", DefaultNumMsgs, "Number of Messages to Publish")
var msgSize = flag.Int("ms", DefaultMessageSize, "Size of the message.")
var csvFile = flag.String("csv", "", "Save bench data to csv file")
log.SetFlags(0)
flag.Usage = usage
flag.Parse()
args := flag.Args()
if len(args) != 1 {
usage()
}
if *numMsgs <= 0 {
log.Fatal("Number of messages should be greater than zero.")
}
// Setup the option block
opts := nats.DefaultOptions
opts.Servers = strings.Split(*urls, ",")
for i, s := range opts.Servers {
opts.Servers[i] = strings.Trim(s, " ")
}
opts.Secure = *tls
benchmark = bench.NewBenchmark("NATS", *numSubs, *numPubs)
var startwg sync.WaitGroup
var donewg sync.WaitGroup
donewg.Add(*numPubs + *numSubs)
// Run Subscribers first
startwg.Add(*numSubs)
for i := 0; i < *numSubs; i++ {
go runSubscriber(&startwg, &donewg, opts, *numMsgs, *msgSize)
}
startwg.Wait()
// Now Publishers
startwg.Add(*numPubs)
pubCounts := bench.MsgsPerClient(*numMsgs, *numPubs)
for i := 0; i < *numPubs; i++ {
go runPublisher(&startwg, &donewg, opts, pubCounts[i], *msgSize)
}
log.Printf("Starting benchmark [msgs=%d, msgsize=%d, pubs=%d, subs=%d]\n", *numMsgs, *msgSize, *numPubs, *numSubs)
startwg.Wait()
donewg.Wait()
benchmark.Close()
fmt.Print(benchmark.Report())
if len(*csvFile) > 0 {
csv := benchmark.CSV()
ioutil.WriteFile(*csvFile, []byte(csv), 0644)
fmt.Printf("Saved metric data in csv file %s\n", *csvFile)
}
}
func runPublisher(startwg, donewg *sync.WaitGroup, opts nats.Options, numMsgs int, msgSize int) {
nc, err := opts.Connect()
if err != nil {
log.Fatalf("Can't connect: %v\n", err)
}
defer nc.Close()
startwg.Done()
args := flag.Args()
subj := args[0]
var msg []byte
if msgSize > 0 {
msg = make([]byte, msgSize)
}
start := time.Now()
for i := 0; i < numMsgs; i++ {
nc.Publish(subj, msg)
}
nc.Flush()
benchmark.AddPubSample(bench.NewSample(numMsgs, msgSize, start, time.Now(), nc))
donewg.Done()
}
func runSubscriber(startwg, donewg *sync.WaitGroup, opts nats.Options, numMsgs int, msgSize int) {
nc, err := opts.Connect()
if err != nil {
log.Fatalf("Can't connect: %v\n", err)
}
args := flag.Args()
subj := args[0]
received := 0
start := time.Now()
nc.Subscribe(subj, func(msg *nats.Msg) {
received++
if received >= numMsgs {
benchmark.AddSubSample(bench.NewSample(numMsgs, msgSize, start, time.Now(), nc))
donewg.Done()
nc.Close()
}
})
nc.Flush()
startwg.Done()
}