dashboard: experiment 5

dashboard/dashboard.go

@@ -42,7 +42,7 @@ import (
 )
 
 const (
-	sampleLimit = 200 // Maximum number of data samples
+	sampleLimit = 5 // Maximum number of data samples
 )
 
 // Dashboard contains the dashboard internals.
@@ -100,9 +100,6 @@ func New(config *Config, commit string, logdir string) *Dashboard {
 				DiskRead:       emptyChartEntries(now, sampleLimit, config.Refresh),
 				DiskWrite:      emptyChartEntries(now, sampleLimit, config.Refresh),
 			},
-			//Network: &NetworkMessage{
-			//	PeerBundles: make(map[string]*PeerBundle),
-			//},
 		},
 		logdir: logdir,
 	}

dashboard/geoip.go

@@ -42,6 +42,14 @@ type GeoDBInfo struct {
 	} `maxminddb:"location" json:"location,omitempty"`
 }
 
+// GeoLocation contains geographical information.
+type GeoLocation struct {
+	Country   string  `json:"country,omitempty"`
+	City      string  `json:"city,omitempty"`
+	Latitude  float64 `json:"latitude,omitempty"`
+	Longitude float64 `json:"longitude,omitempty"`
+}
+
 // GeoDB represents a geoip database that can be queried for IP to geographical
 // information conversions.
 type GeoDB struct {

dashboard/message.go

@@ -26,7 +26,8 @@ type Message struct {
 	Home    *HomeMessage    `json:"home,omitempty"`
 	Chain   *ChainMessage   `json:"chain,omitempty"`
 	TxPool  *TxPoolMessage  `json:"txpool,omitempty"`
-	Network *PeerContainer  `json:"network,omitempty"`
+	Network *NetworkMessage `json:"network,omitempty"`
+	Peers   *PeersMessage   `json:"peers,omitempty"`
 	System  *SystemMessage  `json:"system,omitempty"`
 	Logs    *LogsMessage    `json:"logs,omitempty"`
 }
@@ -57,83 +58,9 @@ type TxPoolMessage struct {
 
 // NetworkMessage contains information about the peers organized based on the IP address.
 type NetworkMessage struct {
-	PeerBundles map[string]*PeerBundle `json:"peerBundles,omitempty"`
+	/* TODO (kurkomisi) */
 }
 
-// getOrInitBundle returns the peer bundle belonging to the given IP, or
-// initializes the bundle if it doesn't exist.
-//func (m *NetworkMessage) getOrInitBundle(ip string) *PeerBundle {
-//	if _, ok := m.PeerBundles[ip]; !ok {
-//		m.PeerBundles[ip] = &PeerBundle{
-//			Peers: make(PeerMap),
-//			FailedPeers: make(PeerMap),
-//		}
-//	}
-//	return m.PeerBundles[ip]
-//}
-//
-//// getOrInitPeer returns the peer belonging to the given IP and node id, or
-//// initializes the peer if it doesn't exist.
-//func (m *NetworkMessage) getOrInitPeer(ip, id string) *Peer {
-//	return m.getOrInitBundle(ip).getOrInitPeer(id)
-//}
-
-//type PeerMap map[string]*Peer
-
-//func (pm PeerMap) getOrInitBundle(id string) *Peer {
-//	if _, ok := pm[id]; !ok {
-//		pm[id] = new(Peer)
-//	}
-//	return pm[id]
-//}
-//
-//func (pm PeerMap) remove(id string) {
-//	delete(pm, id)
-//}
-
-//// PeerBundle contains information about the peers pertaining to an IP address.
-//type PeerBundle struct {
-//	Location    *GeoLocation `json:"location,omitempty"` // geographical information based on IP
-//	Peers       PeerMap      `json:"peers,omitempty"`    // the peers' node id is used as key
-//	FailedPeers PeerMap      `json:"failedPeers,omitempty"`
-//}
-//
-//func (b *PeerBundle) getOrInitPeer(id string) *Peer {
-//	return b.Peers.getOrInitBundle(id)
-//}
-//
-//func (b *PeerBundle) removePeer(id string) {
-//	b.Peers.remove(id)
-//}
-//
-//func (b *PeerBundle) getOrInitFailedPeer(id string) *Peer {
-//	return b.FailedPeers.getOrInitBundle(id)
-//}
-//
-//func (b * PeerBundle) removeFailedPeer(id string) {
-//	b.FailedPeers.remove(id)
-//}
-
-// GeoLocation contains geographical information.
-type GeoLocation struct {
-	Country   string  `json:"country,omitempty"`
-	City      string  `json:"city,omitempty"`
-	Latitude  float64 `json:"latitude,omitempty"`
-	Longitude float64 `json:"longitude,omitempty"`
-}
-
-// Peer contains lifecycle timestamps and traffic information of a given peer.
-//type Peer struct {
-//	Connected    []time.Time `json:"connected,omitempty"`
-//	Disconnected []time.Time `json:"disconnected,omitempty"`
-//
-//	Ingress ChartEntries `json:"ingress,omitempty"`
-//	Egress  ChartEntries `json:"egress,omitempty"`
-//
-//	element *list.Element
-//	ip, id string
-//}
-
 // SystemMessage contains the metered system data samples.
 type SystemMessage struct {
 	ActiveMemory   ChartEntries `json:"activeMemory,omitempty"`

dashboard/peers.go

@@ -34,149 +34,286 @@ const (
 	unknownPeerLimit = p2p.MeteredPeerLimit
 )
 
-type PeerContainer struct {
+// PeersMessage contains information about the node's peers. This data structure
-	Bundles map[string]*PeerBundle `json:"peerBundles,omitempty"`
+// tries to maintain the metered peer data based on the different behaviours of
+// the peers.
+//
+// Every peer has an IP address, and the peers that manage to make the handshake
+// have node IDs. There can appear more peers with the same IP, therefore the
+// peer maintainer data structure is a tree consisting of a map of maps, where
+// the first key groups the peers by IP, while the second one groups them by the
+// node ID. The peers failing before the handshake only have IP addresses, so
+// they are stored as part of the value of the outer map. A peer can connect
+// multiple times, so an array is needed to store the consecutive sessions.
+//
+// Another criteria is to limit the number of metered peers so that they don't
+// fill the memory. The metered peers are selected based on their activity: the
+// peers that are inactive for the longest time are thrown first. For the selection a fifo
+// list is used which is linked to the bottom of the peer tree, and when a peer
+// is removed from the list, it is also removed from the tree. The active peers
+// have priority over the disconnected ones, therefore this list is extended by
+// a separator, which is a pointer to a list element. The separator separates the
+// active peers from the inactive ones, and it is the entry for the list. If the
+// peer that is to be inserted is active, it goes before the separator, otherwise
+// it goes after. This way the peers that are active for the longest time are at
+// the beginning of the list, and the inactive ones move to the end. When a peer
+// has some activity, it is removed from and reinserted into the list.
+//
+// The peers that don't manage to make handshake are not inserted into the list,
+// their sessions are not stored, only their connection attempts are appended
+// to the array belonging to their IP. In order to keep the fifo principle, a super
+// array contains the order of the attempts, and when the peer count reaches the
+// limit, the earliest attempt is removed from the beginning of its array.
+type PeersMessage struct {
+	// Bundles is the outer map using the peer's IP address as key.
+	Bundles map[string]*PeerBundle `json:"bundles,omitempty"`
 
+	RemovedKnown   []string `json:"removedKnown,omitempty"`
+	RemovedUnknown []string `json:"removedUnknown,omitempty"`
+
+	// activeSeparator is a pointer to the last active peer element, splitting
+	// the list into an active and inactive part, and forming the entry for the
+	// peer list.
 	activeSeparator *list.Element
+
+	// knownPeers contains the peers that managed to make handshake.
 	knownPeers *list.List
+
+	// unknownPeers contains pointers to the peer bundles that belong to the
+	// IP addresses, from which the peers attempted to connect then failed.
+	// Its values are appended in the moment of the attempt, so in chronological
+	// order, which means that the oldest attempt is at the beginning of the array.
+	// When the first element is removed, the first element of the linked bundle's
+	// attempt array is also removed, ensuring that always the latest attempts are stored.
 	unknownPeers []*PeerBundle
 
+	// geodb is used to look up the geographical data based on the IP.
 	geodb *GeoDB
-	refresh time.Duration
 }
 
-func NewPeerContainer(geodb *GeoDB, refresh time.Duration) *PeerContainer {
+// NewPeersMessage returns a new instance of the metered peer maintainer data structure.
-	return &PeerContainer{
+func NewPeersMessage(geodb *GeoDB) *PeersMessage {
+	return &PeersMessage{
 		Bundles:      make(map[string]*PeerBundle),
 		knownPeers:   list.New(),
 		unknownPeers: make([]*PeerBundle, 0, unknownPeerLimit),
 		geodb:        geodb,
-		refresh:      refresh,
 	}
 }
 
-func (pc *PeerContainer) getOrInitBundle(ip string) *PeerBundle {
+func (m *PeersMessage) hasBundle(ip string) bool {
-	if _, ok := pc.Bundles[ip]; !ok {
+	_, ok := m.Bundles[ip]
-		pc.Bundles[ip] = &PeerBundle{
+	return ok
-			Location:   pc.geodb.Location(ip),
+}
+
+func (m *PeersMessage) hasPeer(ip, id string) bool {
+	if !m.hasBundle(ip) {
+		return false
+	}
+	return m.Bundles[ip].has(id)
+}
+
+// getOrInitBundle returns the bundle belonging to the given IP.
+// Inserts a new bundle into the map if it doesn't already exist.
+func (m *PeersMessage) getOrInitBundle(ip string) *PeerBundle {
+	if _, ok := m.Bundles[ip]; !ok {
+		m.Bundles[ip] = &PeerBundle{
+			Location:   m.geodb.Location(ip),
 			KnownPeers: make(map[string]*KnownPeer),
-			parent:     pc,
+			root:       m,
 			ip:         ip,
 		}
 	}
-	return pc.Bundles[ip]
+	return m.Bundles[ip]
 }
 
-func (pc *PeerContainer) updateKnown(ip, id string, session *PeerSession) (removedIP, removedID string) {
+func (m *PeersMessage) getOrInitKnownPeer(ip, id string) *KnownPeer {
-	peer := pc.getOrInitBundle(ip).getOrInitKnown(id)
+	return m.getOrInitBundle(ip).getOrInitKnownPeer(id)
-	if peer.Sessions == nil {
-		peer.Sessions = []*PeerSession{{
-			Ingress: emptyChartEntries(time.Now(), 5, pc.refresh),
-			Egress:  emptyChartEntries(time.Now(), 5, pc.refresh),
-		}}
 }
+
+// updateKnownPeer updates the last session of the peer belonging to the given IP
+// and ID and returns the IP and the ID of the removed peer if there is any,
+// (nil, nil) otherwise.
+func (m *PeersMessage) updateKnownPeer(ip, id string, session *PeerSession) (removedKey string) {
+	peer := m.getOrInitKnownPeer(ip, id)
 	if peer.listElement != nil {
-		if peer.listElement == pc.activeSeparator {
+		// If the peer is already part of the list, remove it first.
-			pc.activeSeparator = pc.activeSeparator.Prev()
+		if peer.listElement == m.activeSeparator {
+			m.activeSeparator = m.activeSeparator.Prev()
 		}
-		pc.knownPeers.Remove(peer.listElement)
+		m.knownPeers.Remove(peer.listElement)
 	}
-	if pc.knownPeers.Len() >= knownPeerLimit {
+	if m.knownPeers.Len() >= knownPeerLimit {
-		removed := pc.knownPeers.Remove(pc.knownPeers.Back())
+		// If the peer count reached the limit, remove the last element of the
+		// list, which is the oldest inactive one.
+		removed := m.knownPeers.Remove(m.knownPeers.Back())
 		if p, ok := removed.(*KnownPeer); ok {
-			removedIP, removedID = p.parent.ip, p.id
+			removedKey = fmt.Sprintf("%s/%s", p.bundle.ip, p.id)
-			p.delete()
+			p.delete() // Remove the peer from the tree.
 		} else {
 			log.Warn("Bad value used as peer", "value", removed)
 		}
 	}
-	if pc.activeSeparator == nil {
+	if m.activeSeparator == nil {
-		peer.listElement = pc.knownPeers.PushFront(peer)
+		// If there isn't any active peer in the list, push the new peer to the
+		// front of the list.
+		peer.listElement = m.knownPeers.PushFront(peer)
 	} else {
-		peer.listElement = pc.knownPeers.InsertAfter(peer, pc.activeSeparator)
+		// If there are active peers in the list, push the new peer after them.
+		peer.listElement = m.knownPeers.InsertAfter(peer, m.activeSeparator)
 	}
 	peer.update(session)
 	if peer.Sessions[len(peer.Sessions)-1].Disconnected == nil {
-		pc.activeSeparator = peer.listElement
+		// If the new peer is active, step to it with the separator.
+		m.activeSeparator = peer.listElement
 	}
-	return removedIP, removedID
+	return removedKey
 }
 
-func (pc *PeerContainer) updateUnknown(ip string, peer *UnknownPeer) {
+// updateUnknownPeer inserts a peer connection attempt into the peer tree.
-	if len(pc.unknownPeers) >= unknownPeerLimit {
+func (m *PeersMessage) updateUnknownPeer(ip string, peer *UnknownPeer) (removedKey string) {
-		removed := pc.unknownPeers[0]
+	if len(m.unknownPeers) >= unknownPeerLimit {
+		// If the count of the metered unknown peers reached the limit,
+		// remove the oldest attempt, which is the first element of the
+		// array belonging to the peer bundle pointed by the first element
+		// of the super unknown peer array.
+		removed := m.unknownPeers[0]
 		removed.UnknownPeers = removed.UnknownPeers[1:]
-		pc.unknownPeers = pc.unknownPeers[1:]
+		m.unknownPeers = m.unknownPeers[1:]
+		removedKey = removed.ip
 	}
-	bundle := pc.getOrInitBundle(ip)
+	bundle := m.getOrInitBundle(ip)
 	bundle.UnknownPeers = append(bundle.UnknownPeers, peer)
-	pc.unknownPeers = append(pc.unknownPeers, bundle)
+	m.unknownPeers = append(m.unknownPeers, bundle)
+
+	return removedKey
 }
 
-func (pc *PeerContainer) clear() {
+// clear removes the elements of the metered peer list, and removes the linked
-	for pc.knownPeers.Front() != nil {
+// peers from the peer tree along the way.
-		first := pc.knownPeers.Front()
+func (m *PeersMessage) clear() {
-		if p, ok := first.Value.(*KnownPeer); ok {
+	for m.knownPeers.Front() != nil {
+		first := m.knownPeers.Remove(m.knownPeers.Front())
+		if p, ok := first.(*KnownPeer); ok {
 			p.delete()
 		} else {
 			log.Warn("Bad value used as peer", "value", first)
 		}
 	}
-	pc.activeSeparator = nil
+	m.activeSeparator = nil
 }
 
-func (pc *PeerContainer) updateTraffic(traffic *peerTraffic) {
+func (m *PeersMessage) updateTraffic(ip, id string, ingress, egress float64) {
-	now := time.Now()
+	if !m.hasPeer(ip, id) {
-	for e := pc.knownPeers.Front(); e != nil; e = e.Next() {
+		m.updateKnownPeer(ip, id, &PeerSession{
-		if p, ok := e.Value.(*KnownPeer); ok {
+			Ingress: ChartEntries{&ChartEntry{
-			key := fmt.Sprintf("%s/%s", p.parent.ip, p.id)
+				Value: ingress,
-			p.updateTraffic(
+			}},
-				&ChartEntry{Time: now, Value: float64(traffic.ingress[key])},
+			Egress: ChartEntries{&ChartEntry{
-				&ChartEntry{Time: now, Value: float64(traffic.egress[key])},
+				Value: egress,
+			}},
+		})
+		return
+	}
+	m.getOrInitKnownPeer(ip, id).updateTraffic(
+		&ChartEntry{Value: ingress},
+		&ChartEntry{Value: egress},
 	)
-		} else {
-			log.Warn("Bad value used as peer", "value", e.Value)
-		}
-	}
 }
 
+//func (m *PeersMessage) updateTraffic(ingress, egress *map[string]float64) {
+//	now := time.Now()
+//	for k, v := range *ingress {
+//
+//	}
+//	for e := m.knownPeers.Front(); e != nil; e = e.Next() {
+//		if p, ok := e.Value.(*KnownPeer); ok {
+//			key := fmt.Sprintf("%s/%s", p.bundle.ip, p.id)
+//			p.updateTraffic(
+//				&ChartEntry{Time: now, Value: (*ingress)[key]},
+//				&ChartEntry{Time: now, Value: (*egress)[key]},
+//			)
+//		} else {
+//			log.Warn("Bad value used as peer", "value", e.Value)
+//		}
+//	}
+//}
+
+// append
+func (m *PeersMessage) append(n *PeersMessage) (removedKnown, removedUnknown []string) {
+	for _, bundle := range n.Bundles {
+		for _, peer := range bundle.KnownPeers {
+			for _, session := range peer.Sessions {
+				removedKey := m.updateKnownPeer(bundle.ip, peer.id, session)
+				if removedKey != "" {
+					removedKnown = append(removedKnown, removedKey)
+				}
+			}
+		}
+		for _, peer := range bundle.UnknownPeers {
+			removedKey := m.updateUnknownPeer(bundle.ip, peer)
+			if removedKey != "" {
+				removedUnknown = append(removedUnknown, removedKey)
+			}
+		}
+	}
+	return removedKnown, removedUnknown
+}
+
+// PeerBundle contains the peers belonging to a given IP address
 type PeerBundle struct {
-	Location     *GeoLocation          `json:"location,omitempty"`
+	Location *GeoLocation `json:"location,omitempty"` // Geographical location based on IP
+
+	// KnownPeers is the inner map of the metered peer maintainer data structure
+	// using the node ID as key.
 	KnownPeers map[string]*KnownPeer `json:"knownPeers,omitempty"`
+
+	// UnknownPeers contains the failed connection attempts of the peers
+	// belonging to a given IP address in chronological order.
 	UnknownPeers []*UnknownPeer `json:"unknownPeers,omitempty"`
 
-	parent  *PeerContainer
+	root *PeersMessage // Pointer to the outer map.
-	ip      string
+	ip   string        // Key of the bundle in the outer map.
-	element list.Element
 }
 
-func (b *PeerBundle) getOrInitKnown(id string) *KnownPeer {
+func (b *PeerBundle) has(id string) bool {
+	_, ok := b.KnownPeers[id]
+	return ok
+}
+
+// getOrInitKnownPeer returns the peer belonging to the given ID.
+// Initializes it if it doesn't already exist.
+func (b *PeerBundle) getOrInitKnownPeer(id string) *KnownPeer {
 	if _, ok := b.KnownPeers[id]; !ok {
 		b.KnownPeers[id] = &KnownPeer{
-			parent: b,
+			sampleCount: sampleLimit,
+			bundle:      b,
 			id:          id,
 		}
 	}
 	return b.KnownPeers[id]
 }
 
+// KnownPeer contains the metered data of a particular peer.
 type KnownPeer struct {
+	// Sessions contains the metered data in a session of a peer.
 	Sessions []*PeerSession `json:"sessions,omitempty"`
 
-	parent *PeerBundle
+	sampleCount int
-	id     string
 
-	listElement *list.Element
+	bundle *PeerBundle // Pointer to the inner map.
+	id     string      // Key of the peer in the inner map.
+
+	listElement *list.Element // Pointer to the peer element in the list.
 }
 
 func (peer *KnownPeer) delete() {
-	delete(peer.parent.KnownPeers, peer.id)
+	delete(peer.bundle.KnownPeers, peer.id)
-	fmt.Println(peer, "to make sure p is not cleared")
+	if len(peer.bundle.KnownPeers) < 1 && len(peer.bundle.UnknownPeers) < 1 {
-	if len(peer.parent.KnownPeers) < 1 && len(peer.parent.UnknownPeers) < 1 {
+		delete(peer.bundle.root.Bundles, peer.bundle.ip)
-		delete(peer.parent.parent.Bundles, peer.parent.ip)
 	}
 	peer.listElement = nil
-	peer.parent = nil
+	peer.bundle = nil
 	for i := range peer.Sessions {
 		peer.Sessions[i] = nil
 	}
@@ -184,16 +321,35 @@ func (peer *KnownPeer) delete() {
 }
 
 func (peer *KnownPeer) update(session *PeerSession) {
+	if peer.Sessions == nil {
+		peer.Sessions = []*PeerSession{session}
 		if session.Connected != nil && session.Disconnected != nil && session.Connected.After(*session.Disconnected) {
-		peer.Sessions[len(peer.Sessions)-1].Disconnected = session.Disconnected
+			peer.Sessions = append(peer.Sessions, &PeerSession{Connected: session.Connected})
+			session.Connected = nil
+		}
+		return
+	}
+	if session.Connected != nil && session.Disconnected != nil && session.Connected.After(*session.Disconnected) {
+		last := peer.Sessions[len(peer.Sessions)-1]
+		if last.Connected == nil {
+			// This may happen at the beginning, if the connection was established
+			// before the initialization of the peer event feed. Otherwise it should
+			// not happen to handle a disconnect event before the connect, because
+			// both of them are coming on the same channel consecutively.
+			log.Warn("Disconnect event appeared without connect")
+		}
+		last.Disconnected = session.Disconnected
+		last.Ingress = append(last.Ingress, session.Ingress...)
+		last.Egress = append(last.Egress, session.Egress...)
 		session.Disconnected = nil
+		session.Ingress = nil
+		session.Egress = nil
 	}
 	if session.Connected != nil {
 		peer.Sessions = append(peer.Sessions, session)
 	}
-	last := peer.Sessions[len(peer.Sessions)-1]
 	if session.Disconnected != nil {
-		last.Disconnected = session.Disconnected
+		peer.Sessions[len(peer.Sessions)-1].Disconnected = session.Disconnected
 	}
 	for i := 0; i < len(session.Ingress) && i < len(session.Egress); i++ {
 		peer.updateTraffic(session.Ingress[i], session.Egress[i])
@@ -201,15 +357,36 @@ func (peer *KnownPeer) update(session *PeerSession) {
 }
 
 func (peer *KnownPeer) updateTraffic(ingress, egress *ChartEntry) {
-	first, last := peer.Sessions[0], peer.Sessions[len(peer.Sessions)-1]
+	if ingress == nil {
+		ingress = new(ChartEntry)
+	}
+	if egress == nil {
+		egress = new(ChartEntry)
+	}
+	first := peer.Sessions[0]
+	if len(first.Ingress) < 1 || len(first.Egress) < 1 {
+		first.Ingress = append(first.Ingress, ingress)
+		first.Egress = append(first.Egress, egress)
+		peer.sampleCount = 1
+		return
+	}
+	if peer.sampleCount >= sampleLimit {
 		if len(first.Ingress) < 2 || len(first.Egress) < 2 {
 			peer.Sessions = peer.Sessions[1:]
 		} else {
 			first.Ingress = first.Ingress[1:]
 			first.Egress = first.Egress[1:]
 		}
+		peer.sampleCount--
+	}
+	last := peer.Sessions[len(peer.Sessions)-1]
 	last.Ingress = append(last.Ingress, ingress)
 	last.Egress = append(last.Egress, egress)
+	peer.sampleCount++
+}
+
+func (peer *KnownPeer) len() int {
+	return peer.sampleCount
 }
 
 type PeerSession struct {
@@ -221,13 +398,8 @@ type PeerSession struct {
 }
 
 type UnknownPeer struct {
-	Connected    time.Time `json:"connected,omitempty"`
+	Connected    time.Time `json:"connected"`
-	Disconnected time.Time `json:"disconnected,omitempty"`
+	Disconnected time.Time `json:"disconnected"`
-}
-
-type peerTraffic struct {
-	ingress map[string]int64
-	egress  map[string]int64
 }
 
 // collectPeerData gathers data about the peers and sends it to the clients.
@@ -250,19 +422,24 @@ func (db *Dashboard) collectPeerData() {
 	ticker := time.NewTicker(db.config.Refresh)
 	defer ticker.Stop()
 
-	pc := NewPeerContainer(db.geodb, db.config.Refresh)
+	db.peerLock.Lock()
+	db.history.Peers = NewPeersMessage(db.geodb)
+	db.peerLock.Unlock()
+	diff := NewPeersMessage(db.geodb)
 
-	trafficUpdater := func(prefix string) func(*map[string]int64) func(name string, i interface{}) {
+	trafficCollector := func(prefix string) func(*map[string]float64) func(name string, i interface{}) {
-		return func(entryMap *map[string]int64) func(name string, i interface{}) {
+		return func(traffic *map[string]float64) func(name string, i interface{}) {
 			return func(name string, i interface{}) {
 				if m, ok := i.(metrics.Meter); ok {
-					(*entryMap)[strings.TrimPrefix(name, prefix)] = m.Count()
+					(*traffic)[strings.TrimPrefix(name, prefix)] = float64(m.Count())
+				} else {
+					log.Warn("Bad value used as meter", "name", name)
 				}
 			}
 		}
 	}
-	updateIngress := trafficUpdater(p2p.MetricsInboundTraffic + "/")
+	collectIngress := trafficCollector(p2p.MetricsInboundTraffic + "/")
-	updateEgress := trafficUpdater(p2p.MetricsOutboundTraffic + "/")
+	collectEgress := trafficCollector(p2p.MetricsOutboundTraffic + "/")
 
 	for {
 		select {
@@ -271,11 +448,11 @@ func (db *Dashboard) collectPeerData() {
 			switch event.Type {
 			case p2p.PeerConnected:
 				connected := now.Add(-event.Elapsed)
-				pc.updateKnown(event.IP.String(), event.ID, &PeerSession{
+				diff.updateKnownPeer(event.IP.String(), event.ID, &PeerSession{
 					Connected: &connected,
 				})
 			case p2p.PeerDisconnected:
-				pc.updateKnown(event.IP.String(), event.ID, &PeerSession{
+				diff.updateKnownPeer(event.IP.String(), event.ID, &PeerSession{
 					Disconnected: &now,
 					Ingress: ChartEntries{
 						&ChartEntry{
@@ -291,7 +468,7 @@ func (db *Dashboard) collectPeerData() {
 					},
 				})
 			case p2p.PeerHandshakeFailed:
-				pc.updateUnknown(event.IP.String(), &UnknownPeer{
+				diff.updateUnknownPeer(event.IP.String(), &UnknownPeer{
 					Connected:    now.Add(-event.Elapsed),
 					Disconnected: now,
 				})
@@ -299,16 +476,68 @@ func (db *Dashboard) collectPeerData() {
 				log.Error("Unknown metered peer event type", "type", event.Type)
 			}
 		case <-ticker.C:
-			traffic := peerTraffic{
+			ingress, egress := make(map[string]float64), make(map[string]float64)
-				ingress: make(map[string]int64),
+			db.peerLock.Lock()
-				egress:  make(map[string]int64),
+			for e := db.history.Peers.knownPeers.Front(); e != nil; e = e.Next() {
+				if p, ok := e.Value.(*KnownPeer); ok {
+					key := fmt.Sprintf("%s/%s", p.bundle.ip, p.id)
+					ingress[key] = 0
+					egress[key] = 0
 				}
-			p2p.PeerIngressRegistry.Each(updateIngress(&traffic.ingress))
+			}
-			p2p.PeerEgressRegistry.Each(updateEgress(&traffic.egress))
+			p2p.PeerIngressRegistry.Each(collectIngress(&ingress))
-			pc.updateTraffic(&traffic)
+			p2p.PeerEgressRegistry.Each(collectEgress(&egress))
-			s, _ := json.MarshalIndent(pc, "", "  ")
+			//diff.updateTraffic(&ingress, &egress)
+			for key := range ingress {
+				if k := strings.Split(key, "/"); len(k) == 2 {
+					diff.updateTraffic(k[0], k[1], ingress[key], egress[key])
+				} else {
+					log.Warn("Bad key", "key", key)
+				}
+			}
+			for key := range egress {
+				if _, ok := ingress[key]; !ok {
+					if k := strings.Split(key, "/"); len(k) == 2 {
+						diff.updateTraffic(k[0], k[1], ingress[key], egress[key])
+					} else {
+						log.Warn("Bad key", "key", key)
+					}
+				}
+			}
+			for _, bundle := range diff.Bundles {
+				for _, peer := range bundle.KnownPeers {
+					var ipExists, idExists bool
+					var b *PeerBundle
+					if b, ipExists = db.history.Peers.Bundles[bundle.ip]; ipExists {
+						_, idExists = b.KnownPeers[peer.id]
+					}
+					if !idExists || !ipExists {
+						fmt.Println("doesn't exist ", bundle.ip, peer.id)
+						//t, n := time.Now(), sampleLimit-peer.len()
+						//if len(peer.Sessions) > 0 && peer.Sessions[0].Connected != nil {
+						//	t = *peer.Sessions[0].Connected
+						//}
+						//peer.Sessions = append([]*PeerSession{{
+						//	Ingress: emptyChartEntries(t, n, db.config.Refresh),
+						//	Egress:  emptyChartEntries(t, n, db.config.Refresh),
+						//}}, peer.Sessions...)
+					} else {
+						fmt.Println("does exist    ", bundle.ip, peer.id)
+						s, _ := json.MarshalIndent(bundle, "", "  ")
 						fmt.Println(string(s))
-			//db.sendToAll(&Message{Network: pc})
+						fmt.Println(ingress[fmt.Sprintf("%s/%s", bundle.ip, peer.id)])
+						fmt.Println(egress[fmt.Sprintf("%s/%s", bundle.ip, peer.id)])
+					}
+				}
+			}
+			diff.RemovedKnown, diff.RemovedUnknown = db.history.Peers.append(diff)
+			//sh, _ := json.MarshalIndent(db.history.Network, "", "  ")
+			//fmt.Println(string(sh))
+			db.peerLock.Unlock()
+			//s, _ := json.MarshalIndent(diff, "", "  ")
+			//fmt.Println(string(s))
+			//db.sendToAll(&Message{Peers: diff})
+			diff.clear()
 		case err := <-subPeer.Err():
 			log.Warn("Peer subscription error", "err", err)
 			return