Verifikation von IP-Multicast | 2. April 2015 | Final Presentation subtitle: 20pt Arial Regular, teal R045 | G182 | B179 Recommended maximum length: 2.

Präsentation zum Thema: "Verifikation von IP-Multicast | 2. April 2015 | Final Presentation subtitle: 20pt Arial Regular, teal R045 | G182 | B179 Recommended maximum length: 2."—  Präsentation transkript:

1 Verifikation von IP-Multicast | 2. April 2015 | Final Presentation subtitle: 20pt Arial Regular, teal R045 | G182 | B179 Recommended maximum length: 2 lines Confidentiality/date line: 13pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Disclaimer information may also be appear in this area. Place flush left, aligned at bottom, 8-10pt Arial Regular, white IBM logo must not be moved, added to, or altered in any way. Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements Presentation title: 28pt Arial Regular, black Recommended maximum length: 2 lines Group name: 17pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast am Max-Planck- Institut Erste Ergebnisse Steffen Tambach Title slide

2 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 2 Agenda Rückblick – letzter Stand Aktueller Stand Weiteres Vorgehen/ Lösung? Diskussion & Fragen 5 Min. 10 Min. 15 Min. 40 Min. Messungen an der Senke

3 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 3 Agenda Rückblick – letzter Stand Aktueller Stand Weiteres Vorgehen/ Lösung? Diskussion & Fragen Messungen an der Senke

4 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 4 Wdh. Testszenario No. 4 – Paketverlustmessungen am Empfänger Messwerte (gesendet 1.000.000 Pkts. à 100 Byte) Shomiti (1.000.000 Pkts.) Receiver 1 (999.980 Pkts.) Receiver 2 (1.000.000 Pkts.) Receiver 3 (1.000.000 Pkts.) Receiver 4 (997.680 Pkts.)

5 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 5 Nachweisbare Verluste auf der Empfängerseite erfordern weitere Testszenarien (Vorschläge aus der letzten Diskussionsrunde):  Verwendung von reinem UDP unicast anstelle von IP-Multicast  Verwendung von TCP anstelle UDP: Werden Datenpakete wiederholt gesendet?  Künstliche Erzeugung eines burstartigen Verhaltens der Quelle  Quelle ist der Verursacher von Verlusten bei der Senke  Besteht ein Unterschied zwischen C/C++ und Java hinsichtlich der verwendeten Ressourcen?  Punkt-zu-Punkt-Verbindung mit TAP und Shomiti Explorer (Simulation der Quelle mittels Paketgenerator des Shomiti Explorer) Rückblick (Diskussion)

6 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 6 Agenda Rückblick – letzter Stand Aktueller Stand Weiteres Vorgehen/ Lösung? Diskussion & Fragen Messungen an der Senke

7 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 7 Empfänger-Testszenario No. 1 zum Suchen der Paketverluste in der Senke Erweiterung der Testprogramme mcReceiverJava (Java-Code) mcReceiverC (C/C++-Code BSD Socket-API) mcSniffer (Linux paket filter) mcModule.ko (Kernel-Modul f. 2.6.x. Benutzt die Hook-Funktionen im Netzwerkstack des Kernels)

8 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 8  50 Messreihen à 100 Byte payload (Ø 2ms pro Paket)  Stochastisches Auftreten der Paketverluste bei den Empfängern Ergebnisse 1.Shomiti – Kanal 1 (TAP)alle gesendeten Pakete empfangen 2.Shomiti – Kanal 2 (Switch)alle gesendeten Pakete empfangen 3.mcReceiverJava0 ~ 3.000 Pakete verloren 4.mcReceiver0 ~ 1.000 Pakete verloren 5.mcSniffer0 ~ 900 Pakete verloren alle 6.mcModulealle gesendeten Pakete empfangen ÄWie werden ankommende Pakete von der NIC bzw. vom Kernel behandelt?

9 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 9 Weg eines Pakets im Linux-Kernel (Auszug) Quelle: Linux Architektur – Konzepte, Strukturen und Algorithmen von Kernel 2.6

10 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 10 Linux 2.4.x / 2.6.x- Kernel  Konfigurationsmöglichkeiten  Kernel-Patch  Neukompilierung des Kernels  zur Laufzeit über das /proc - Filesystem (root-Rechte erfordl.) echo 20971152 > /proc/sys/net/core/rmem_default echo 1048576 > /proc/sys/net/core/rmem_max  weitere Einstellung zu den jeweiligen Socket-Buffer sind hier ebenfalls möglich ( wmem_default )  Aber eine zusätzliche Kontrolle ist im Programm zur Laufzeit notwendig! Socket-Konfiguration – WrtBuffer/ RcvBuffer(1/2)

11 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 11  Unter C/C++ (Linux) verwendet die BSD Socket-API standardmäßig die rmem_default bzw. wmem_default Werte. Diese Werte sind kernelabhängig! int rcvSize =1048576, socket_descriptor =0; socket_descritor =socket(PF_INET, SOCK_DGRAM, 0); setsockopt ( socket_descriptor, SOL_SOCKET, SO_RCVBUF, &rcvSize, sizeof(rcvSize) );  Für Java-Anwendungen gilt der Default-Wert (i.d.R. 54KB) Multicast mc =new MulticastSocket(int port); mc.setReceiveBufferSize(int size)  Konfiguration der default bzw. max -Werte im Betriebssystem MS Windows 2000/XP ? Socket-Konfiguration – WrtBuffer/ RcvBuffer (2/2)

12 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 12  UDP-Verluste auf Empfängerseite sind u.a. ein Bufferproblem  UDP besitzt keine Flusskontrolle, d.h. ist der Socket-Buffer voll, werden ankommende Pakete verworfen  Aufbau und Speicherstruktur von Netzwerkkomponenten spielen hier eine wichtige Rolle! Zusammenfassung

13 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 13 Agenda Einführung/ Rückblick Aktueller Stand Weiteres Vorgehen/ Lösung? Diskussion & Fragen Messungen an der Senke

14 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 14 Umsetzung der gewonnenen Erkenntnisse im MonitorClient (MonClient)(1/2) CPU- Auslastung Netzwerk- verkehr

15 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 15 Umsetzung der gewonnenen Erkenntnisse im MonitorClient (MonClient) - Erhöhung der Bandbreite(2/2)

16 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 16 MonitorClient (MonClient) – Architektur UML-Diagramm MonClient (Auszug) GUI network

17 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 17 MonitorClient (MonClient) – Messungen zur Laufzeit(1/2)  Test des Empfangs von Paketen sowie deren Visualisierung mittels der Open Source Physics Library (vgl. Folie 14/15) durch zwei Referenzzähler innerhalb der Klassen MonClientWorker und MCAReceiver  Ausgabe/ Ergebnis erfolgt durch die addShutdownHook-Methode (Runtime) nach Beendigung des MonClients  Messergebnisse (Auszug) ~ 5,4MBit/s; 72000 Pkts.; 3 hops pktCounterModulepktCounterRcv.pktCounterVisualizer 72000 7200021224 720007200024601 720007200024960 720007200019724 …

18 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 18 MonitorClient (MonClient) – Messungen zur Laufzeit(2/2)  Wdh. mit voller Bandbreite (91,21 Mbit/s) führt zum Verwerfen empfangener Pakete bereits auf der Netzwerkkarte – sh. NIC-Statistik  Messergebnisse(Auszug) ~ 91,21 MBit/s; 7.200.000 Pkts. pktCounterModulepktCounterRcv.pktCounterVisualizer 7.081.2225.563.73023.250 7.200.0005.560.13224.220 … eth0 Protokoll:Ethernet Hardware Adresse 00:0A:E4:2E:2A:34 inet Adresse:172.17.10.5 Bcast:172.17.255.255 Maske:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:12544657491 errors:118778 dropped:237556 overruns:118778 TX packets:1456 errors:0 dropped:0 overruns:0 carrier:0 Kollisionen:0 Sendewarteschlangenlänge:1000 …

19 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 19 Agenda Einführung/ Rückblick Aktueller Stand Weiteres Vorgehen/ Lösung? Diskussion & Fragen Messungen an der Senke

20 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 20 UDP besitzt eine unregulierte Senderate (u.a. CPU-abhängig)  Implementierung UDP mit dynamischer Lastanpassung (adaptive Überlastkontrolle)  Aufbrechen des BooleanLock-Musters (Thread-Synchronisation)  asynchrone I/O, Paketwarteschlange Weiteres Vorgehen

21 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 21 Danke Noch Fragen?

22 IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to http://w3.ibm.com/ibm/presentations Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 22 Diskussionsergebnisse / @ToDo  Der Open Source Physics Visualizer besitzt nur eine begrenzte Aufnahme von Daten?  Schnittstelle Netzwerkkommunikation C/C++  Darstellung der Daten mit Java  Konkrete Aussagen über die Konfiguration unter Win2000/ XP  Windows Registry  Hennig/Müller  Testprogramm Speichergrenze für UDP-Sockets  Nice to have: jfreechart  OSP