/
nfs-tester.go
189 lines (150 loc) · 3.86 KB
/
nfs-tester.go
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package main
import (
"errors"
"fmt"
"io"
"math/rand"
"os"
"strconv"
"sync"
"sync/atomic"
"time"
"github.com/joshuarobinson/go-nfs-client/nfs"
"github.com/joshuarobinson/go-nfs-client/nfs/rpc"
)
const nfsTestPeriod = 60
type NFSTester struct {
nfshost string
export string
concurrency int
wg sync.WaitGroup
atm_finished int32
atm_counter_bytes_written uint64
atm_counter_bytes_read uint64
filesWritten int
}
func NewNFSTester(nfshost string, export string, concurrency int) (*NFSTester, error) {
if len(nfshost) == 0 || len(export) == 0 {
err := errors.New("[error] Must specify host and export.")
return nil, err
}
nfsTester := &NFSTester{nfshost: nfshost, export: export, concurrency: concurrency, filesWritten: 0}
// Try and mount to verify
mount, err := nfs.DialMount(nfshost, false)
if err != nil {
err := errors.New("[error] Unable to dial mount service.")
return nil, err
}
defer mount.Close()
auth := rpc.NewAuthUnix("anon", 1001, 1001)
target, err := mount.Mount(export, auth.Auth(), false)
if err != nil {
err := errors.New("[error] Unable to mount export.")
return nil, err
}
defer target.Close()
return nfsTester, err
}
func (n *NFSTester) writeOneFile(fname string) {
defer n.wg.Done()
mount, err := nfs.DialMount(n.nfshost, false)
if err != nil {
fmt.Println("Portmapper failed.")
fmt.Println(err)
return
}
auth := rpc.NewAuthUnix("anon", 1001, 1001)
target, err := mount.Mount(n.export, auth.Auth(), false)
if err != nil {
fmt.Println("Unable to mount.")
fmt.Println(err)
return
}
srcBuf := make([]byte, 1024*1024)
rand.Read(srcBuf)
f, err := target.OpenFile(fname, os.FileMode(int(0744)))
if err != nil {
fmt.Printf("OpenFile %s failed\n", fname)
fmt.Println(err)
return
}
var bytes_written uint64
bytes_written = 0
for atomic.LoadInt32(&n.atm_finished) == 0 {
n, _ := f.Write(srcBuf)
bytes_written += uint64(n)
}
atomic.AddUint64(&n.atm_counter_bytes_written, bytes_written)
}
func generateTestFilename(i int) string {
baseDir := "/"
fname := baseDir + "filename" + strconv.Itoa(i)
return fname
}
func (n *NFSTester) WriteTest() float64 {
atomic.StoreInt32(&n.atm_finished, 0)
atomic.StoreUint64(&n.atm_counter_bytes_written, 0)
for i := 1; i <= n.concurrency; i++ {
fname := generateTestFilename(i)
n.wg.Add(1)
go n.writeOneFile(fname)
}
time.Sleep(nfsTestPeriod * time.Second)
atomic.StoreInt32(&n.atm_finished, 1)
n.wg.Wait()
n.filesWritten += n.concurrency
total_bytes := atomic.LoadUint64(&n.atm_counter_bytes_written)
return float64(total_bytes) / float64(nfsTestPeriod)
}
func (n *NFSTester) readOneFile(fname string) {
defer n.wg.Done()
mount, err := nfs.DialMount(n.nfshost, false)
if err != nil {
fmt.Println(err)
return
}
auth := rpc.NewAuthUnix("anon", 1001, 1001)
target, err := mount.Mount(n.export, auth.Auth(), false)
if err != nil {
fmt.Println(err)
return
}
p := make([]byte, 512*1024)
byte_counter := uint64(0)
for {
f, err := target.Open(fname)
if err != nil {
fmt.Println(err)
return
}
for {
if atomic.LoadInt32(&n.atm_finished) == 1 {
atomic.AddUint64(&n.atm_counter_bytes_read, byte_counter)
return
}
n, err := f.Read(p)
if err == io.EOF {
break
}
byte_counter += uint64(n)
}
}
}
func (n *NFSTester) ReadTest() float64 {
if n.filesWritten == 0 {
fmt.Println("[error] Unable to perform ReadTest, no files written.")
return float64(0)
}
atomic.StoreInt32(&n.atm_finished, 0)
atomic.StoreUint64(&n.atm_counter_bytes_read, 0)
for i := 1; i <= n.filesWritten; i++ {
fname := generateTestFilename(i)
n.wg.Add(1)
go n.readOneFile(fname)
}
time.Sleep(nfsTestPeriod * time.Second)
atomic.StoreInt32(&n.atm_finished, 1)
n.wg.Wait()
total_bytes := atomic.LoadUint64(&n.atm_counter_bytes_read)
return float64(total_bytes) / float64(nfsTestPeriod)
}