Пример #1
0
func mainCleanUp() {
	log.Infof("Cleaning up...")
	err := node.Destroy()
	if err != nil {
		log.Infof("Error destroying node: %s", err.Error())
	}
}
Пример #2
0
func (u *outputDB) Commit(tag uint32, force bool) error {
	if force || u.db.WAValueLen() > kaiju.GetConfig().MaxKdbWAValueLen {
		log.Infof("Committing blocks up to number %d ...", tag)
		err := u.db.Commit(tag)
		log.Infof("Committed blocks up to number %d", tag)
		return err
	}
	return nil
}
Пример #3
0
// Returns *Stats, tag, cursor
func readHeader(s Storage) (*Stats, uint32, int64, error) {
	errInvalid := errors.New("Invalid KDB header")
	p := make([]byte, HeaderSize)
	if _, err := s.Read(p); err != nil {
		return nil, 0, 0, err
	}
	if p[0] != 'K' || p[1] != 'D' || p[2] != 'B' || Version != p[3] {
		return nil, 0, 0, errInvalid
	}
	if SlotSize != p[4] || ValLenUnit != p[5] || HeaderSize != p[6] {
		return nil, 0, 0, errInvalid
	}
	buf := bytes.NewBuffer(p[8:])
	stats := new(Stats)
	var tag uint32
	var cursor int64
	binary.Read(buf, binary.LittleEndian, &stats.capacity)
	binary.Read(buf, binary.LittleEndian, &stats.records)
	binary.Read(buf, binary.LittleEndian, &stats.deadSlots)
	binary.Read(buf, binary.LittleEndian, &stats.deadValues)
	for i := 0; i < 6; i++ { //reserved space
		var n int32
		binary.Read(buf, binary.LittleEndian, &n)
	}
	binary.Read(buf, binary.LittleEndian, &tag)
	binary.Read(buf, binary.LittleEndian, &cursor)
	if stats.capacity <= 0 {
		return nil, 0, 0, errInvalid
	} else if cursor < HeaderSize+int64(stats.capacity)*2*SlotSize {
		return nil, 0, 0, errInvalid
	}
	log.Infof("kdb readHeader: capacity %d records %d deadSlots %d deadValues %d tag %d cursor %d",
		stats.capacity, stats.records, stats.deadSlots, stats.deadValues, tag, cursor)
	return stats, tag, cursor, nil
}
Пример #4
0
func newSwdl(begin int, end int, paral int, load int) *swdl {
	// Open a window that wider than paral * load
	maxSlots := (end - begin) / load
	slots := paral * 4
	if slots > maxSlots {
		slots = maxSlots
	}
	s := slots * load
	if slots == 0 {
		s = end - begin
	}
	log.Infof("newSwdl begin %d end %d winsize %d", begin, end, s)
	return &swdl{
		begin:  begin,
		end:    end,
		paral:  paral,
		load:   load,
		cursor: begin,
		size:   s,
		window: make([]interface{}, 0),
		chout:  make(chan map[int]*blockchain.InvElement),
		chin:   make(chan map[int]interface{}),
		chblock: make(chan struct {
			btcmsg.Message
			I int
		}),
		done: make(chan struct{}),
		ca:   newSwdlca(),
	}
}
Пример #5
0
func (db *KDB) Rebuild(capacity uint32, s Storage, was Storage) (*KDB, error) {
	newdb, err := New(capacity, s, was)
	if err != nil {
		return nil, err
	}
	f := func(i uint32, sd []byte, val []byte, mv bool) error {
		n, err := newdb.slotScan(sd[:InternalKeySize], nil, nil)
		if err != nil {
			return err
		}
		binary.LittleEndian.PutUint32(sd[InternalKeySize:], newdb.dataLoc())
		newdb.writeKey(sd, n)
		newdb.writeValue(val, keyData(sd).unitValLen(), mv)
		if i%100000 == 0 {
			newdb.commit(i)
			log.Infof("KDB.Rebuild: current key count:%d", i)
		}
		return nil
	}
	db.smutex.RLock()
	defer db.smutex.RUnlock()
	if _, _, err = db.enumerate(f); err != nil {
		return nil, err
	}
	if tag, err := db.tag(); err != nil {
		return nil, err
	} else {
		newdb.commit(tag)
	}
	return newdb, nil
}
Пример #6
0
// Append downloaded headers.
// TODO: more robust way of getting old blocks
func (h *headers) Append(hs []*catma.Header) error {
	if len(hs) == 0 {
		return nil
	}
	oldL := len(h.data) - 1 // excluding genesis
	for _, header := range hs {
		err := h.appendHeader(header)
		if err != nil {
			return err
		}
	}
	// Write to file as well
	f := h.file
	// Caclulate the offset
	offset := int64(binary.Size(hs[0]) * oldL)
	_, err := f.Seek(offset, 0)
	if err != nil {
		return err
	}
	for _, header := range hs {
		err := binary.Write(f, binary.LittleEndian, header)
		if err != nil {
			return err
		}
	}
	log.Infof("Headers total: %v", len(h.data))
	return f.Sync()
}
Пример #7
0
// Load block headers saved in file.
// Errors are not returned to caller, simply print a log
func (h *headers) loadHeaders() {
	r := h.file
	for {
		ch := new(catma.Header)
		if err := binary.Read(r, binary.LittleEndian, ch); err == nil {
			if err = h.appendHeader(ch); err != nil {
				log.Infof("Error loading block header: %s", err)
				break
			}
		} else {
			if err != io.EOF {
				log.Infof("Error reading blcok header file: %s", err)
			}
			break
		}
	}
	log.Infof("Loaded header count: %v", len(h.data))
}
Пример #8
0
func (p *addrPool) dump() {
	stats := make(map[int32]int32)
	for e := p.addrStatusQueue.Front(); e != nil; e = e.Next() {
		t := e.Value.(*addrStatus).timesFailed
		if c, ok := stats[t]; ok {
			stats[t] = c + 1
		} else {
			stats[t] = 1
		}
	}
	log.Infof("AddrPool Dump %v", stats)
}
Пример #9
0
func (sw *swdl) start() {
	sw.wg.Add(1) // For doSaveBlocks
	for i := 0; i < sw.paral; i++ {
		go sw.doDownload()
	}
	go sw.doSaveBlock()
	go sw.doSchedule()

	sw.chin <- nil // Trigger downloading
	sw.wg.Wait()

	db := cold.Get().OutputDB()
	if err := db.Commit(uint32(sw.end-1), true); err != nil {
		log.Panicf("db commit error: %s", err)
	}
	log.Infof("Finished downloading from %d to %d", sw.begin, sw.end)
}
Пример #10
0
func moreHeaders() {
	headers := cold.Get().Headers()
	l := headers.GetLocator()
	msg := btcmsg.NewGetHeadersMsg()
	mg := msg.(*btcmsg.Message_getheaders)
	mg.BlockLocators = l
	mg.HashStop = new(klib.Hash256)

	f := func(m btcmsg.Message) (bool, bool) {
		_, ok := m.(*btcmsg.Message_headers)
		return ok, true
	}

	mh := knet.ParalMsgForMsg(mg, f, 3)
	if mh != nil {
		h, _ := mh.(*btcmsg.Message_headers)
		err := headers.Append(h.Headers)
		if err != nil {
			log.Infof("Error appending headers: %s", err)
		}
	}
}
Пример #11
0
func mainFunc() {
	c := make(chan struct{})

	log.Infof("Starting KNet...")
	ch, err := knet.Start(10)
	if err != nil {
		log.Infof("Error starting knet: %s", err)
	}
	<-ch
	log.Infof("KNet initialized.")

	log.Infof("Initializing Node...")
	err = node.Init()
	if err != nil {
		log.Infof("Error initializing Node: %s", err.Error())
		return
	}
	log.Infof("Starting Node...")
	node.Start()
	log.Infof("Node started.")

	// Don't quit
	_ = <-c
}
Пример #12
0
func (sw *swdl) schedule(msgs map[int]interface{}) {
	// 1. Fill blanks with downloaded blocks
	got := 0
	for k, v := range msgs {
		i := k - sw.cursor
		if _, ok := v.(*btcmsg.Message_block); ok {
			got++
		}
		sw.window[i] = v
	}
	// 2. Congestion control
	if len(msgs) > 0 && sw.ca.update(got, len(msgs)) {
		// Send nil for a "NOP" download
		sw.sendWork(nil)
		return
	}
	// 3. Slide window and process blocks
	dist := len(sw.window) // Slide distance
	for i, elem := range sw.window {
		if bm, ok := elem.(*btcmsg.Message_block); ok {
			//log.Infoln("save block", i + sw.cursor, i, sw.cursor, bm.Header.Hash())
			sw.chblock <- struct {
				btcmsg.Message
				I int
			}{bm, i + sw.cursor}
		} else {
			dist = i
			break
		}
	}
	if dist > 0 {
		log.Infof("swdl: window slided %d", dist)
	}
	sw.window = sw.window[dist:]
	sw.cursor += dist
	l := len(sw.window)
	for i := l; i < sw.size; i++ {
		p := sw.cursor + i
		if p >= sw.end {
			break
		}
		ie := blockchain.GetInvElem(p)
		sw.window = append(sw.window, ie)
	}
	if len(sw.window) == 0 {
		close(sw.done) // All blocks downloaded
	}
	// 4. Handle unfinished work
	unfinished := make(map[int]*blockchain.InvElement)
	for i, elem := range sw.window {
		if ie, ok := elem.(*blockchain.InvElement); ok {
			unfinished[sw.cursor+i] = ie
		}
	}
	l = len(unfinished)
	if len(msgs) > 0 {
		log.Debugf("winsize %d left %d got %d cursor %d health %f", len(sw.window), l, got, sw.cursor, sw.ca.health)
	}
	if l == 0 { // No blocks left, do nothing
	} else if l <= sw.load {
		sw.sendWork(unfinished)
	} else {
		work := make(map[int]*blockchain.InvElement)
		for k, v := range unfinished {
			work[k] = v
			if len(work) >= sw.load {
				if !sw.sendWork(work) { // channel is full
					break
				}
				work = make(map[int]*blockchain.InvElement)
			}
		}
	}
}