ACM Multimedia 2004

1. ACM Multimedia 2004 Towards an Integrated Multimedia Service Hosting OverlayDongyan Xu, Xuxian JiangDepartment of Computer Sciences Center for Education and Research in Information Assurance and Security (CERIAS) Purdue University

2. Outline • Motivation • MSODA architecture • MSODA components • Virtualization of service hosting overlay • Related work • Conclusions

3. Image Repair Summarization Music Mixing Motivation • Proliferation of value-added and function-rich media services • Pervasive media sources: live cam, TV, radio… • Content-based processing: tracking, enhancement, mix-reality… • User-specific media service composition: • Surveillance cams  image recognition  scene correlation • Home video  jitter elimination  music mixing  mixed-reality rendering

4. Motivation • Service oriented architectures • Users don’t have to know • Service implementation details • Service instance locations • Service-level routing decisions • Service providers have more flexibility in • Implementation • Deployment strategy: placement, replication, migration, resource scaling, coalition • Management: upgrade, troubleshooting, recovery

5. Motivation • Service providers meet service host Service providers: Have no infrastructure For deployment Service host (e.g. Yahoo, MSN): Needs rich services to serve customers A service-oriented “marketplace”: Hosts a large variety of media services for customer access and composition

6. Challenges • Decoupling service management from hosting platform management • Isolating management of different media services • Protecting hosting platform from untrusted media services • Enabling agile media service workflow optimization • On-demand service capacity scaling • Service instance replication and re-location

7. Our Solution: MSODA (Media Service On-Demand Architecture) • Infrastructure: MSODA hosts in wide-area network • Media service instances : virtual machines in MSODA hosts • Media service cloud : virtual network of service instances • Service gateways : edges of service cloud and interface to customers

8. MSODA Architecture Service Instance (VM) MSODA host Service gateway

9. MSODA Host • Two-level architecture • Host • Virtual machines • Host domain MSODA daemons • Resource allocation • Network monitoring • Traffic tunneling • Service routing … … … S1 S2 Guest OS Guest OS MSODA daemons Host OS An MSODA host

10. Composite service request Service path signaling Service data/stream MSODA Gateway • Interface to service clients • Service composition • Service configuration • Edge of service cloud • Bridging service instances (virtual machines) to client machines: limited and controlled access Client Service instance (VM) MSODA gateway

11. S1 S2 MSODA Gateway • Service composition and configuration • User-centric customization • Resource conservation S1 S2 512Kbps S2 256Kbps 256Kbps

12. Media Service Cloud • A virtual network of service instances (VMs) • Based on network virtualization technique (VIOLIN) • VN for VMs • Using MSODA hosts as underlying carrier (layer-2 on UDP) • Emulating advanced network protocols (e.g., IP multicast) • IP-compliant, with its IP address space • Isolation from underlying Internet

13. Media Service Cloud • Advantages • Protection of MSODA infrastructure • Service traffic volume control • Service instance reachability control • Decoupling of • Media service function (by service developer) • Service provisioning and composition mechanisms (by MSODA developer)

14. Media Service Cloud • Multicast and anycast group for each media service • Multicast group: convenient service management (e.g., asking all instances of a service to report current load/QoS/most popular content…) • Anycast group: service composition routing (e.g., specifying the next service in the service delivery workflow) • Simple APIs for easy media service implementation • Actual operations performed by underlying MSODA hosts

15. Media Service Cloud • Dynamic service cloud evolution • Service instance resource scaling • Service instance replication • Service instance re-location S1 S1 S1 S2 S2 S2 Service instance replication Resource scaling Time

16. MSODA Prototype • Service instances (VMs) enabled by User-Mode Linux (UML) • Service cloud (virtual network) enabled by VIOLIN • Acceptable network performance degradation • Automatic service instance creation and re-location • Centralized computation of service delivery paths • Local and wide-area (PlanetLab-based) testbeds • Virtual private Grids for dynamic scientific applications

17. Related Work • Service composition frameworks • Ninja, SAHARA, CANS, SPY-Net, SpiderNet • Service overlay networks • SOI (Service-Oriented Internet) • Opus (Overlay Peer Utility Service) • Overlay networking • RON, OverQoS, Narada, Overcast, I3 • Resource virtualization • Virtual machine: Denali, VMware, UML, Xen • Virtual network: VNET, VIOLIN • Virtual environment: In-VIGO

18. Conclusions • MSODA: an integrated media service hosting platform for service composition • Virtual machine as granularity for service instance management and manipulation • Virtual service cloud network • Platform-independent media service development and management • Maximum manipulability for dynamic service instance scaling, replication, and re-location • Strong protection of MSODA platform from untrusted media services/clients

19. Thank you. For more information: Email: {dxu, jiangx}@cs.purdue.edu URL: www.cs.purdue.edu/~dxu Google: “Purdue SODA friends”