/
newsync.go
237 lines (226 loc) · 6.18 KB
/
newsync.go
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package data
import (
"bytes"
"io/ioutil"
"log"
"math/rand"
"os"
"sync/atomic"
"time"
"github.com/bgokden/veri/annoyindex"
"github.com/bgokden/veri/util"
pb "github.com/bgokden/veri/veriservice"
)
type DBMapEntry struct {
ExprireAt int64
Datum *pb.Datum
}
func CloseEnough(a, b int64) bool {
c := a - b
return c < 10 && c > -10
}
func (dt *Data) InsertBDMap(datum *pb.Datum, config *pb.InsertConfig) error {
exprireAt := int64(0)
if config != nil && config.TTL != 0 {
exprireAt = time.Now().Unix() + int64(config.TTL)
}
datum.Clean()
entry := &DBMapEntry{
ExprireAt: exprireAt,
Datum: datum,
}
keyByte, err := GetKeyAsBytes(datum)
if err != nil {
return err
}
mapKey := util.EncodeToString(keyByte)
isNewEntry := true // calulcation of this a bit expensive but it limit the runs
if oldEntryInfterface, ok := dt.DBMap.Load(mapKey); ok {
if oldEntry, ok2 := oldEntryInfterface.(*DBMapEntry); ok2 && oldEntry != nil && oldEntry.Datum != nil {
valueByte, err := GetValueAsBytes(datum)
if err != nil {
return err
}
oldValueByte, err := GetValueAsBytes(oldEntry.Datum)
if err != nil {
return err
}
if bytes.Compare(valueByte, oldValueByte) == 0 && CloseEnough(entry.ExprireAt, oldEntry.ExprireAt) {
isNewEntry = false
}
}
}
if isNewEntry {
dt.DBMap.Store(mapKey, entry)
atomic.AddUint64(&(dt.RecentInsertCount), 1)
}
return nil
}
func (dt *Data) DeleteBDMap(datum *pb.Datum) error {
keyByte, err := GetKeyAsBytes(datum)
if err != nil {
return err
}
dt.DBMap.Delete(string(keyByte))
return nil
}
func (dt *Data) LoopDBMap(entryFunction func(entry *DBMapEntry) error) error {
var lastError error
dt.DBMap.Range(func(key, value interface{}) bool {
if mapEntry, ok := value.(*DBMapEntry); ok {
if mapEntry.ExprireAt != 0 && mapEntry.ExprireAt <= time.Now().Unix() {
dt.DBMap.Delete(key)
return true
}
err := entryFunction(mapEntry)
if err != nil {
lastError = err
return false
}
}
return true
})
return lastError
}
func (dt *Data) Process(force bool) error {
diffMap, limit := dt.DataSourceDiffMap()
localInfo := dt.GetDataInfo()
localN := localInfo.N
transferLimit := localInfo.N / 10 // this is arbitary
timeDiff := getCurrentTime() - dt.LastRunTimestamp
recentInsertCount := atomic.LoadUint64(&(dt.RecentInsertCount))
if (timeDiff >= 60 && (recentInsertCount > 0 || limit > transferLimit || timeDiff >= 600)) || force {
atomic.StoreUint64(&(dt.RecentInsertCount), 0)
config := dt.GetConfig()
datumStream := make(chan *pb.InsertDatumWithConfig, limit)
defer close(datumStream)
insertionCounter := uint64(0)
fraction := float64(0)
if localN > 0 {
fraction = float64(limit) / float64(localN)
countMap := make(map[string]uint64, len(diffMap))
go func() {
deleted := uint64(0)
counter := 0
for datum := range datumStream {
for id, count := range diffMap {
if countMap[id] < count {
if sourceItem, ok := dt.Sources.Get(id); ok {
if source, ok2 := sourceItem.(DataSource); ok2 {
err := source.Insert(datum.Datum, datum.Config)
if err != nil && CheckIfUnkownError(err) {
log.Printf("Sending Insert error %v\n", err.Error())
}
if err == nil {
counter++
}
if err == nil && (!dt.Alive || isEvictionOn(localInfo, config, deleted)) {
countMap[id]++
dt.DeleteBDMap(datum.Datum)
deleted++
}
}
}
}
}
}
}()
}
n := uint64(0)
distance := 0.0
maxDistance := 0.0
avg := make([]float32, 0)
hist := make([]float32, 64)
nFloat := float32(dt.N)
if nFloat == 0 {
nFloat = 1
}
histUnit := 1 / nFloat
newDataIndex := make([]*pb.Datum, max(1000, int(dt.N)))
var newAnnoyIndex annoyindex.AnnoyIndexAngular
var newTempFileName string
err := dt.LoopDBMap(func(entry *DBMapEntry) error {
n++
avg = CalculateAverage(avg, entry.Datum.Key.Feature, nFloat)
distance = VectorDistance(dt.Avg, entry.Datum.Key.Feature)
if distance > maxDistance {
maxDistance = distance
}
if dt.MaxDistance != 0 {
index := int((distance / dt.MaxDistance) * 64)
if index >= 64 {
index = 63
}
if index <= 0 {
index = 0
}
hist[index] += histUnit
}
i := int(n - 1)
if dt.Alive && i < len(newDataIndex) {
if newAnnoyIndex == nil {
// newAnnoyIndex = annoyindex.NewAnnoyIndexEuclidean(len(datum.Key.Feature))
newAnnoyIndex = annoyindex.NewAnnoyIndexAngular(len(entry.Datum.Key.Feature))
tmpfile, err := ioutil.TempFile("", "annoy")
if err == nil {
newTempFileName = tmpfile.Name()
newAnnoyIndex.OnDiskBuild(newTempFileName)
}
}
newAnnoyIndex.AddItem(i, entry.Datum.Key.Feature)
newDataIndex[i] = entry.Datum
}
if !dt.Alive || (insertionCounter < limit && rand.Float64() < fraction) {
config := InsertConfigFromExpireAt(uint64(entry.ExprireAt))
if config.TTL > 10 {
datumStream <- &pb.InsertDatumWithConfig{
Datum: entry.Datum,
Config: config,
}
insertionCounter++
}
}
return nil
})
if err != nil {
return err
}
dt.Avg = avg
dt.Hist = hist
dt.MaxDistance = maxDistance
dt.N = n
dt.LastRunTimestamp = getCurrentTime()
if newAnnoyIndex != nil {
start := time.Now()
newAnnoyIndex.Build(-1) // Previosly 10, -1 creates index dynamically
elapsed := time.Since(start)
log.Printf("Building annoy index took %s", elapsed)
// log.Printf("Updating index. len: %v\n", len(newDataIndex))
dt.Annoyer.Lock()
if dt.Annoyer.DataIndex != nil {
dt.Annoyer.AnnoyIndex.Unload() // Not sure if this is needed
annoyindex.DeleteAnnoyIndexAngular(dt.Annoyer.AnnoyIndex)
}
oldFile := dt.Annoyer.BuildFileName
dt.Annoyer.BuildFileName = newTempFileName
dt.Annoyer.AnnoyIndex = newAnnoyIndex
dt.Annoyer.DataIndex = &newDataIndex
dt.Annoyer.Unlock()
if len(oldFile) > 0 {
os.Remove(oldFile)
}
}
}
dt.Timestamp = getCurrentTime()
dt.Dirty = false
return nil
}
func (dt *Data) StreamAll(datumStream chan<- *pb.Datum) error {
err := dt.LoopDBMap(func(entry *DBMapEntry) error {
if entry != nil && entry.Datum != nil {
datumStream <- entry.Datum
}
return nil
})
return err
}