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influx_stress.go
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influx_stress.go
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package main
import (
"flag"
"fmt"
"math/rand"
"net/url"
"runtime"
"sort"
"sync"
"time"
"github.com/influxdb/influxdb/client"
)
var (
batchSize = flag.Int("batchsize", 5000, "number of points per batch")
seriesCount = flag.Int("series", 100000, "number of unique series to create")
pointCount = flag.Int("points", 100, "number of points per series to create")
concurrency = flag.Int("concurrency", 10, "number of simultaneous writes to run")
batchInterval = flag.Duration("batchinterval", 0*time.Second, "duration between batches")
database = flag.String("database", "stress", "name of database")
address = flag.String("addr", "localhost:8086", "IP address and port of database (e.g., localhost:8086)")
)
func main() {
flag.Parse()
runtime.GOMAXPROCS(runtime.NumCPU())
startTime := time.Now()
counter := NewConcurrencyLimiter(*concurrency)
u, _ := url.Parse(fmt.Sprintf("http://%s", *address))
c, err := client.NewClient(client.Config{URL: *u})
if err != nil {
panic(err)
}
var mu sync.Mutex
var wg sync.WaitGroup
responseTimes := make([]int, 0)
failedRequests := 0
totalPoints := 0
lastSuccess := true
batch := &client.BatchPoints{
Database: *database,
WriteConsistency: "any",
Time: time.Now(),
Precision: "n",
}
for i := 1; i <= *pointCount; i++ {
for j := 1; j <= *seriesCount; j++ {
p := client.Point{
Measurement: "cpu",
Tags: map[string]string{"region": "uswest", "host": fmt.Sprintf("host-%d", j)},
Fields: map[string]interface{}{"value": rand.Float64()},
}
batch.Points = append(batch.Points, p)
if len(batch.Points) >= *batchSize {
wg.Add(1)
counter.Increment()
totalPoints += len(batch.Points)
go func(b *client.BatchPoints, total int) {
st := time.Now()
if _, err := c.Write(*b); err != nil {
mu.Lock()
if lastSuccess {
fmt.Println("ERROR: ", err.Error())
}
failedRequests += 1
totalPoints -= len(b.Points)
lastSuccess = false
mu.Unlock()
} else {
mu.Lock()
if !lastSuccess {
fmt.Println("success in ", time.Since(st))
}
lastSuccess = true
responseTimes = append(responseTimes, int(time.Since(st).Nanoseconds()))
mu.Unlock()
}
wg.Done()
counter.Decrement()
if total%500000 == 0 {
fmt.Printf("%d total points. %d in %s\n", total, *batchSize, time.Since(st))
}
}(batch, totalPoints)
batch = &client.BatchPoints{
Database: *database,
WriteConsistency: "any",
Precision: "n",
Time: time.Now(),
}
}
}
}
wg.Wait()
sort.Sort(sort.Reverse(sort.IntSlice(responseTimes)))
total := int64(0)
for _, t := range responseTimes {
total += int64(t)
}
mean := total / int64(len(responseTimes))
fmt.Printf("Wrote %d points at average rate of %.0f\n", totalPoints, float64(totalPoints)/time.Since(startTime).Seconds())
fmt.Printf("%d requests failed for %d total points that didn't get posted.\n", failedRequests, failedRequests**batchSize)
fmt.Println("Average response time: ", time.Duration(mean))
fmt.Println("Slowest response times:")
for _, r := range responseTimes[:100] {
fmt.Println(time.Duration(r))
}
}
// ConcurrencyLimiter is a go routine safe struct that can be used to
// ensure that no more than a specifid max number of goroutines are
// executing.
type ConcurrencyLimiter struct {
inc chan chan struct{}
dec chan struct{}
max int
count int
}
// NewConcurrencyLimiter returns a configured limiter that will
// ensure that calls to Increment will block if the max is hit.
func NewConcurrencyLimiter(max int) *ConcurrencyLimiter {
c := &ConcurrencyLimiter{
inc: make(chan chan struct{}),
dec: make(chan struct{}, max),
max: max,
}
go c.handleLimits()
return c
}
// Increment will increase the count of running goroutines by 1.
// if the number is currently at the max, the call to Increment
// will block until another goroutine decrements.
func (c *ConcurrencyLimiter) Increment() {
r := make(chan struct{})
c.inc <- r
<-r
}
// Decrement will reduce the count of running goroutines by 1
func (c *ConcurrencyLimiter) Decrement() {
c.dec <- struct{}{}
}
// handleLimits runs in a goroutine to manage the count of
// running goroutines.
func (c *ConcurrencyLimiter) handleLimits() {
for {
r := <-c.inc
if c.count >= c.max {
<-c.dec
c.count--
}
c.count++
r <- struct{}{}
}
}