manualtest/dbstress/main.go
package main
import (
crand "crypto/rand"
"encoding/binary"
"flag"
"fmt"
"log"
rand "math/rand"
"net/http"
_ "net/http/pprof"
"os"
"os/signal"
"path"
"runtime"
"strconv"
"strings"
"sync"
"sync/atomic"
"syscall"
"time"
"github.com/johnsonjh/jleveldb/leveldb"
"github.com/johnsonjh/jleveldb/leveldb/errors"
"github.com/johnsonjh/jleveldb/leveldb/filter"
"github.com/johnsonjh/jleveldb/leveldb/opt"
"github.com/johnsonjh/jleveldb/leveldb/storage"
"github.com/johnsonjh/jleveldb/leveldb/table"
"github.com/johnsonjh/jleveldb/leveldb/util"
)
var (
dbPath = path.Join(os.TempDir(), "goleveldb-testdb")
openFilesCacheCapacity = 500
keyLen = 63
valueLen = 256
numKeys = arrayInt{100000, 1332, 531, 1234, 9553, 1024, 35743}
httpProf = "127.0.0.1:5454"
transactionProb = 0.5
enableBlockCache = false
enableCompression = false
enableBufferPool = false
wg = new(sync.WaitGroup)
done, fail uint32
bpool *util.BufferPool
)
type arrayInt []int
func (a arrayInt) String() string {
var str string
for i, n := range a {
if i > 0 {
str += ","
}
str += strconv.Itoa(n)
}
return str
}
func (a *arrayInt) Set(str string) error {
var na arrayInt
for _, s := range strings.Split(str, ",") {
s = strings.TrimSpace(s)
if s != "" {
n, err := strconv.Atoi(s)
if err != nil {
return err
}
na = append(na, n)
}
}
*a = na
return nil
}
func init() {
flag.StringVar(&dbPath, "db", dbPath, "testdb path")
flag.IntVar(&openFilesCacheCapacity, "openfilescachecap", openFilesCacheCapacity, "open files cache capacity")
flag.IntVar(&keyLen, "keylen", keyLen, "key length")
flag.IntVar(&valueLen, "valuelen", valueLen, "value length")
flag.Var(&numKeys, "numkeys", "num keys")
flag.StringVar(&httpProf, "httpprof", httpProf, "http pprof listen addr")
flag.Float64Var(&transactionProb, "transactionprob", transactionProb, "probablity of writes using transaction")
flag.BoolVar(&enableBufferPool, "enablebufferpool", enableBufferPool, "enable buffer pool")
flag.BoolVar(&enableBlockCache, "enableblockcache", enableBlockCache, "enable block cache")
flag.BoolVar(&enableCompression, "enablecompression", enableCompression, "enable block compression")
}
func randomData(dst []byte, ns, prefix byte, i uint32, dataLen int) []byte {
if dataLen < (2+4+4)*2+4 {
panic("dataLen is too small")
}
if cap(dst) < dataLen {
dst = make([]byte, dataLen)
} else {
dst = dst[:dataLen]
}
half := (dataLen - 4) / 2
if _, err := crand.Reader.Read(dst[2 : half-8]); err != nil {
panic(err)
}
dst[0] = ns
dst[1] = prefix
binary.LittleEndian.PutUint32(dst[half-8:], i)
binary.LittleEndian.PutUint32(dst[half-8:], i)
binary.LittleEndian.PutUint32(dst[half-4:], util.NewCRC(dst[:half-4]).Value())
full := half * 2
copy(dst[half:full], dst[:half])
if full < dataLen-4 {
if _, err := crand.Reader.Read(dst[full : dataLen-4]); err != nil {
panic(err)
}
}
binary.LittleEndian.PutUint32(dst[dataLen-4:], util.NewCRC(dst[:dataLen-4]).Value())
return dst
}
func dataSplit(data []byte) (data0, data1 []byte) {
n := (len(data) - 4) / 2
return data[:n], data[n : n+n]
}
func dataNS(data []byte) byte {
return data[0]
}
func dataPrefix(data []byte) byte {
return data[1]
}
func dataI(data []byte) uint32 {
return binary.LittleEndian.Uint32(data[(len(data)-4)/2-8:])
}
func dataChecksum(data []byte) (uint32, uint32) {
checksum0 := binary.LittleEndian.Uint32(data[len(data)-4:])
checksum1 := util.NewCRC(data[:len(data)-4]).Value()
return checksum0, checksum1
}
func dataPrefixSlice(ns, prefix byte) *util.Range {
return util.BytesPrefix([]byte{ns, prefix})
}
func dataNsSlice(ns byte) *util.Range {
return util.BytesPrefix([]byte{ns})
}
type testingStorage struct {
storage.Storage
}
func (ts *testingStorage) scanTable(fd storage.FileDesc, checksum bool) (corrupted bool) {
r, err := ts.Open(fd)
if err != nil {
log.Fatal(err)
}
defer r.Close()
size, err := r.Seek(0, os.SEEK_END)
if err != nil {
log.Fatal(err)
}
o := &opt.Options{
DisableLargeBatchTransaction: true,
Strict: opt.NoStrict,
}
if checksum {
o.Strict = opt.StrictBlockChecksum | opt.StrictReader
}
tr, err := table.NewReader(r, size, fd, nil, bpool, o)
if err != nil {
log.Fatal(err)
}
defer tr.Release()
checkData := func(i int, t string, data []byte) bool {
if len(data) == 0 {
panic(fmt.Sprintf("[%v] nil data: i=%d t=%s", fd, i, t))
}
checksum0, checksum1 := dataChecksum(data)
if checksum0 != checksum1 {
atomic.StoreUint32(&fail, 1)
atomic.StoreUint32(&done, 1)
corrupted = true
data0, data1 := dataSplit(data)
data0c0, data0c1 := dataChecksum(data0)
data1c0, data1c1 := dataChecksum(data1)
log.Printf("FATAL: [%v] Corrupted data i=%d t=%s (%#x != %#x): %x(%v) vs %x(%v)",
fd, i, t, checksum0, checksum1, data0, data0c0 == data0c1, data1, data1c0 == data1c1)
return true
}
return false
}
iter := tr.NewIterator(nil, nil)
defer iter.Release()
for i := 0; iter.Next(); i++ {
ukey, _, kt, kerr := parseIkey(iter.Key())
if kerr != nil {
atomic.StoreUint32(&fail, 1)
atomic.StoreUint32(&done, 1)
corrupted = true
log.Printf("FATAL: [%v] Corrupted ikey i=%d: %v", fd, i, kerr)
return
}
if checkData(i, "key", ukey) {
return
}
if kt == ktVal && checkData(i, "value", iter.Value()) {
return
}
}
if err := iter.Error(); err != nil {
if errors.IsCorrupted(err) {
atomic.StoreUint32(&fail, 1)
atomic.StoreUint32(&done, 1)
corrupted = true
log.Printf("FATAL: [%v] Corruption detected: %v", fd, err)
} else {
log.Fatal(err)
}
}
return
}
func (ts *testingStorage) Remove(fd storage.FileDesc) error {
if atomic.LoadUint32(&fail) == 1 {
return nil
}
if fd.Type == storage.TypeTable {
if ts.scanTable(fd, true) {
return nil
}
}
return ts.Storage.Remove(fd)
}
type latencyStats struct {
mark time.Time
dur, min, max time.Duration
num int
}
func (s *latencyStats) start() {
s.mark = time.Now()
}
func (s *latencyStats) record(n int) {
if s.mark.IsZero() {
panic("not started")
}
dur := time.Since(s.mark)
dur1 := dur / time.Duration(n)
if dur1 < s.min || s.min == 0 {
s.min = dur1
}
if dur1 > s.max {
s.max = dur1
}
s.dur += dur
s.num += n
s.mark = time.Time{}
}
func (s *latencyStats) ratePerSec() int {
durSec := s.dur / time.Second
if durSec > 0 {
return s.num / int(durSec)
}
return s.num
}
func (s *latencyStats) avg() time.Duration {
if s.num > 0 {
return s.dur / time.Duration(s.num)
}
return 0
}
func (s *latencyStats) add(x *latencyStats) {
if x.min < s.min || s.min == 0 {
s.min = x.min
}
if x.max > s.max {
s.max = x.max
}
s.dur += x.dur
s.num += x.num
}
func main() {
flag.Parse()
var src cryptoSource
rnd := rand.New(src)
if enableBufferPool {
bpool = util.NewBufferPool(opt.DefaultBlockSize + 128)
}
log.Printf("Test DB stored at %q", dbPath)
if httpProf != "" {
log.Printf("HTTP pprof listening at %q", httpProf)
runtime.SetBlockProfileRate(1)
go func() {
if err := http.ListenAndServe(httpProf, nil); err != nil {
log.Fatalf("HTTPPROF: %v", err)
}
}()
}
runtime.GOMAXPROCS(runtime.NumCPU())
os.RemoveAll(dbPath)
stor, err := storage.OpenFile(dbPath, false)
if err != nil {
log.Fatal(err)
}
tstor := &testingStorage{stor}
defer tstor.Close()
fatalf := func(err error, format string, v ...interface{}) {
atomic.StoreUint32(&fail, 1)
atomic.StoreUint32(&done, 1)
log.Printf("FATAL: "+format, v...)
if err != nil && errors.IsCorrupted(err) {
cerr := err.(*errors.ErrCorrupted)
if !cerr.Fd.Zero() && cerr.Fd.Type == storage.TypeTable {
log.Print("FATAL: corruption detected, scanning...")
if !tstor.scanTable(storage.FileDesc{Type: storage.TypeTable, Num: cerr.Fd.Num}, false) {
log.Printf("FATAL: unable to find corrupted key/value pair in table %v", cerr.Fd)
}
}
}
runtime.Goexit()
}
if openFilesCacheCapacity == 0 {
openFilesCacheCapacity = -1
}
o := &opt.Options{
OpenFilesCacheCapacity: openFilesCacheCapacity,
DisableBufferPool: !enableBufferPool,
DisableBlockCache: !enableBlockCache,
ErrorIfExist: true,
Compression: opt.NoCompression,
Filter: filter.NewBloomFilter(10),
}
if enableCompression {
o.Compression = opt.DefaultCompression
}
db, err := leveldb.Open(tstor, o)
if err != nil {
log.Fatal(err)
}
defer db.Close()
var (
mu = &sync.Mutex{}
gGetStat = &latencyStats{}
gIterStat = &latencyStats{}
gWriteStat = &latencyStats{}
gTrasactionStat = &latencyStats{}
startTime = time.Now()
writeReq = make(chan *leveldb.Batch)
writeAck = make(chan error)
writeAckAck = make(chan struct{})
)
go func() {
for b := range writeReq {
var err error
if rnd.Float64() < transactionProb {
log.Print("> Write using transaction")
gTrasactionStat.start()
var tr *leveldb.Transaction
if tr, err = db.OpenTransaction(); err == nil {
if err = tr.Write(b, nil); err == nil {
if err = tr.Commit(); err == nil {
gTrasactionStat.record(b.Len())
}
} else {
tr.Discard()
}
}
} else {
gWriteStat.start()
if err = db.Write(b, nil); err == nil {
gWriteStat.record(b.Len())
}
}
writeAck <- err
<-writeAckAck
}
}()
go func() {
for {
time.Sleep(3 * time.Second)
log.Print("------------------------")
log.Printf("> Elapsed=%v", time.Since(startTime))
mu.Lock()
log.Printf("> GetLatencyMin=%v GetLatencyMax=%v GetLatencyAvg=%v GetRatePerSec=%d",
gGetStat.min, gGetStat.max, gGetStat.avg(), gGetStat.ratePerSec())
log.Printf("> IterLatencyMin=%v IterLatencyMax=%v IterLatencyAvg=%v IterRatePerSec=%d",
gIterStat.min, gIterStat.max, gIterStat.avg(), gIterStat.ratePerSec())
log.Printf("> WriteLatencyMin=%v WriteLatencyMax=%v WriteLatencyAvg=%v WriteRatePerSec=%d",
gWriteStat.min, gWriteStat.max, gWriteStat.avg(), gWriteStat.ratePerSec())
log.Printf("> TransactionLatencyMin=%v TransactionLatencyMax=%v TransactionLatencyAvg=%v TransactionRatePerSec=%d",
gTrasactionStat.min, gTrasactionStat.max, gTrasactionStat.avg(), gTrasactionStat.ratePerSec())
mu.Unlock()
cachedblock, _ := db.GetProperty("leveldb.cachedblock")
openedtables, _ := db.GetProperty("leveldb.openedtables")
alivesnaps, _ := db.GetProperty("leveldb.alivesnaps")
aliveiters, _ := db.GetProperty("leveldb.aliveiters")
blockpool, _ := db.GetProperty("leveldb.blockpool")
writeDelay, _ := db.GetProperty("leveldb.writedelay")
ioStats, _ := db.GetProperty("leveldb.iostats")
compCount, _ := db.GetProperty("leveldb.compcount")
log.Printf("> BlockCache=%s OpenedTables=%s AliveSnaps=%s AliveIter=%s BlockPool=%q WriteDelay=%q IOStats=%q CompCount=%q",
cachedblock, openedtables, alivesnaps, aliveiters, blockpool, writeDelay, ioStats, compCount)
log.Print("------------------------")
}
}()
for ns, numKey := range numKeys {
func(ns, numKey int) {
log.Printf("[%02d] STARTING: numKey=%d", ns, numKey)
keys := make([][]byte, numKey)
for i := range keys {
keys[i] = randomData(nil, byte(ns), 1, uint32(i), keyLen)
}
wg.Add(1)
go func() {
var wi uint32
defer func() {
log.Printf("[%02d] WRITER DONE #%d", ns, wi)
wg.Done()
}()
var (
b = new(leveldb.Batch)
k2, v2 []byte
nReader int32
)
for atomic.LoadUint32(&done) == 0 {
log.Printf("[%02d] WRITER #%d", ns, wi)
b.Reset()
for _, k1 := range keys {
k2 = randomData(k2, byte(ns), 2, wi, keyLen)
v2 = randomData(v2, byte(ns), 3, wi, valueLen)
b.Put(k2, v2)
b.Put(k1, k2)
}
writeReq <- b
if err := <-writeAck; err != nil {
writeAckAck <- struct{}{}
fatalf(err, "[%02d] WRITER #%d db.Write: %v", ns, wi, err)
}
snap, err := db.GetSnapshot()
if err != nil {
writeAckAck <- struct{}{}
fatalf(err, "[%02d] WRITER #%d db.GetSnapshot: %v", ns, wi, err)
}
writeAckAck <- struct{}{}
wg.Add(1)
atomic.AddInt32(&nReader, 1)
go func(snapwi uint32, snap *leveldb.Snapshot) {
var (
ri int
iterStat = &latencyStats{}
getStat = &latencyStats{}
)
defer func() {
mu.Lock()
gGetStat.add(getStat)
gIterStat.add(iterStat)
mu.Unlock()
atomic.AddInt32(&nReader, -1)
log.Printf("[%02d] READER #%d.%d DONE Snap=%v Alive=%d IterLatency=%v GetLatency=%v", ns, snapwi, ri, snap, atomic.LoadInt32(&nReader), iterStat.avg(), getStat.avg())
snap.Release()
wg.Done()
}()
stopi := snapwi + 3
for (ri < 3 || atomic.LoadUint32(&wi) < stopi) && atomic.LoadUint32(&done) == 0 {
var n int
iter := snap.NewIterator(dataPrefixSlice(byte(ns), 1), nil)
iterStat.start()
for iter.Next() {
k1 := iter.Key()
k2 := iter.Value()
iterStat.record(1)
if dataNS(k2) != byte(ns) {
fatalf(nil, "[%02d] READER #%d.%d K%d invalid in-key NS: want=%d got=%d", ns, snapwi, ri, n, ns, dataNS(k2))
}
kwritei := dataI(k2)
if kwritei != snapwi {
fatalf(nil, "[%02d] READER #%d.%d K%d invalid in-key iter num: %d", ns, snapwi, ri, n, kwritei)
}
getStat.start()
v2, err := snap.Get(k2, nil)
if err != nil {
fatalf(err, "[%02d] READER #%d.%d K%d snap.Get: %v\nk1: %x\n -> k2: %x", ns, snapwi, ri, n, err, k1, k2)
}
getStat.record(1)
if checksum0, checksum1 := dataChecksum(v2); checksum0 != checksum1 {
err := &errors.ErrCorrupted{Fd: storage.FileDesc{Type: 0xff, Num: 0}, Err: fmt.Errorf("v2: %x: checksum mismatch: %v vs %v", v2, checksum0, checksum1)}
fatalf(err, "[%02d] READER #%d.%d K%d snap.Get: %v\nk1: %x\n -> k2: %x", ns, snapwi, ri, n, err, k1, k2)
}
n++
iterStat.start()
}
iter.Release()
if err := iter.Error(); err != nil {
fatalf(err, "[%02d] READER #%d.%d K%d iter.Error: %v", ns, snapwi, ri, numKey, err)
}
if n != numKey {
fatalf(nil, "[%02d] READER #%d.%d missing keys: want=%d got=%d", ns, snapwi, ri, numKey, n)
}
ri++
}
}(wi, snap)
atomic.AddUint32(&wi, 1)
}
}()
delB := new(leveldb.Batch)
wg.Add(1)
go func() {
var (
i int
iterStat = &latencyStats{}
)
defer func() {
log.Printf("[%02d] SCANNER DONE #%d", ns, i)
wg.Done()
}()
time.Sleep(2 * time.Second)
for atomic.LoadUint32(&done) == 0 {
var n int
delB.Reset()
iter := db.NewIterator(dataNsSlice(byte(ns)), nil)
iterStat.start()
for iter.Next() && atomic.LoadUint32(&done) == 0 {
k := iter.Key()
v := iter.Value()
iterStat.record(1)
for ci, x := range [...][]byte{k, v} {
checksum0, checksum1 := dataChecksum(x)
if checksum0 != checksum1 {
if ci == 0 {
fatalf(nil, "[%02d] SCANNER %d.%d invalid key checksum: want %d, got %d\n%x -> %x", ns, i, n, checksum0, checksum1, k, v)
} else {
fatalf(nil, "[%02d] SCANNER %d.%d invalid value checksum: want %d, got %d\n%x -> %x", ns, i, n, checksum0, checksum1, k, v)
}
}
}
if dataPrefix(k) == 2 || rnd.Int()%999 == 0 {
delB.Delete(k)
}
n++
iterStat.start()
}
iter.Release()
if err := iter.Error(); err != nil {
fatalf(err, "[%02d] SCANNER #%d.%d iter.Error: %v", ns, i, n, err)
}
if n > 0 {
log.Printf("[%02d] SCANNER #%d IterLatency=%v", ns, i, iterStat.avg())
}
if delB.Len() > 0 && atomic.LoadUint32(&done) == 0 {
t := time.Now()
writeReq <- delB
if err := <-writeAck; err != nil {
writeAckAck <- struct{}{}
fatalf(err, "[%02d] SCANNER #%d db.Write: %v", ns, i, err)
} else {
writeAckAck <- struct{}{}
}
log.Printf("[%02d] SCANNER #%d Deleted=%d Time=%v", ns, i, delB.Len(), time.Since(t))
}
i++
}
}()
}(ns, numKey)
}
go func() {
sig := make(chan os.Signal, 1)
signal.Notify(sig, os.Interrupt, syscall.SIGTERM)
log.Printf("Got signal: %v, exiting...", <-sig)
atomic.StoreUint32(&done, 1)
}()
wg.Wait()
}
type cryptoSource struct{}
func (s cryptoSource) Seed(_ int64) {}
func (s cryptoSource) Int63() int64 {
return int64(s.Uint64() & ^uint64(1<<63))
}
func (s cryptoSource) Uint64() (v uint64) {
err := binary.Read(crand.Reader, binary.BigEndian, &v)
if err != nil {
log.Fatal(err)
}
return v
}