func main() {
ro := &opt.ReadOptions{}
wo := &opt.WriteOptions{}
opts := &opt.Options{}
ldb, err := leveldb.OpenFile("dbfile", opts)
if err != nil {
fmt.Printf("db open failed %v\n", err)
return
}
batch := new(leveldb.Batch)
for _, datum := range dataset {
key := fmt.Sprintf("%v", datum.key)
batch.Put([]byte(key), []byte(datum.value))
}
err = ldb.Write(batch, wo)
for _, datum := range dataset {
key := fmt.Sprintf("%v", datum.key)
data, err := ldb.Get([]byte(key), ro)
if err != nil {
fmt.Printf("db read failed %v\n", err)
}
if string(data) != datum.value {
fmt.Printf("mismatched data from db key %v val %v db %v", key, datum.value, data)
}
}
fmt.Printf("completed\n")
ldb.Close()
}
func main() {
flag.Parse()
if 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)
if err != nil {
log.Fatal(err)
}
stor = &testingStorage{stor}
defer stor.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.File != nil && cerr.File.Type == storage.TypeTable {
if !scanTable(stor.GetFile(cerr.File.Num, cerr.File.Type), false) {
log.Printf("FATAL: unable to find corrupted key/value pair in table %v", cerr.File)
}
}
}
runtime.Goexit()
}
if openFilesCacheCapacity == 0 {
openFilesCacheCapacity = -1
}
o := &opt.Options{
OpenFilesCacheCapacity: openFilesCacheCapacity,
DisableBlockCache: !enableBlockCache,
ErrorIfExist: true,
}
db, err := leveldb.Open(stor, o)
if err != nil {
log.Fatal(err)
}
defer db.Close()
var (
mu = &sync.Mutex{}
gGetStat = &latencyStats{}
gIterStat = &latencyStats{}
gWriteStat = &latencyStats{}
startTime = time.Now()
writeReq = make(chan *leveldb.Batch)
writeAck = make(chan error)
writeAckAck = make(chan struct{})
)
go func() {
for b := range writeReq {
gWriteStat.start()
err := db.Write(b, nil)
if err == nil {
gWriteStat.record(b.Len())
}
writeAck <- err
<-writeAckAck
}
}()
go func() {
for {
time.Sleep(3 * time.Second)
log.Print("------------------------")
log.Printf("> Elapsed=%v", time.Now().Sub(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())
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")
log.Printf("> BlockCache=%s OpenedTables=%s AliveSnaps=%s AliveIter=%s BlockPool=%q",
cachedblock, openedtables, alivesnaps, aliveiters, blockpool)
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))
}
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)
v2 = randomData(v2, byte(ns), 3, wi)
b.Put(k2, v2)
b.Put(k1, k2)
}
writeReq <- b
if err := <-writeAck; err != nil {
fatalf(err, "[%02d] WRITER #%d db.Write: %v", ns, wi, err)
}
snap, err := db.GetSnapshot()
if err != nil {
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()
_, 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)
n++
iterStat.start()
}
iter.Release()
if err := iter.Error(); err != nil {
fatalf(nil, "[%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 || mrand.Int()%999 == 0 {
delB.Delete(k)
}
n++
iterStat.start()
}
iter.Release()
if err := iter.Error(); err != nil {
fatalf(nil, "[%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 {
fatalf(err, "[%02d] SCANNER #%d db.Write: %v", ns, i, err)
}
writeAckAck <- struct{}{}
log.Printf("[%02d] SCANNER #%d Deleted=%d Time=%v", ns, i, delB.Len(), time.Now().Sub(t))
}
i++
}
}()
}(ns, numKey)
}
go func() {
sig := make(chan os.Signal)
signal.Notify(sig, os.Interrupt, os.Kill)
log.Printf("Got signal: %v, exiting...", <-sig)
atomic.StoreUint32(&done, 1)
}()
wg.Wait()
}