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Explore MSODA architecture for service hosting overlay, featuring virtualization, management strategies, and infrastructure to offer a variety of media services. Discover the challenges, solutions, and related work in this field.
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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
Outline • Motivation • MSODA architecture • MSODA components • Virtualization of service hosting overlay • Related work • Conclusions
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
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
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
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
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
MSODA Architecture Service Instance (VM) MSODA host Service gateway
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
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
S1 S2 MSODA Gateway • Service composition and configuration • User-centric customization • Resource conservation S1 S2 512Kbps S2 256Kbps 256Kbps
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
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)
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
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
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
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
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
Thank you. For more information: Email: {dxu, jiangx}@cs.purdue.edu URL: www.cs.purdue.edu/~dxu Google: “Purdue SODA friends”