Quality of Service in Event Broker Networks by Shruti P. Mahambre shruti@it.iitb.ac.in Advisor – Prof. Umesh Bellur

Publish-Subscribe System Subscriber Publisher publish Subscribe Unsubscribe notify Subscribe() Notify() Unsubscribe() Event Service The Broker Network - May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

Shruti Mahambre, IIT Bombay UNSW Talk 06 Quality of Service “ QoS or Quality of Service refers to the ability of a system to provide services, such that each users expectations for all non-functional criteria, are met ” May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

Event Based Middleware – Taxonomy May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

Shruti Mahambre, IIT Bombay UNSW Talk 06 Functional Specs May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

Shruti Mahambre, IIT Bombay UNSW Talk 06 Non-Functional Specs May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

Shruti Mahambre, IIT Bombay UNSW Talk 06 Non-Functional Specs May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

Shruti Mahambre, IIT Bombay UNSW Talk 06 Non Functional Specs Reliability – The ratio of number of notifications received of an event type, v/s the number of events published of that event type Delivery Semantics – The number of notifications of events of a particular type delivered to the subscriber Ordering – The sequence in which a notification for an event is sent, w.r.t other events May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

Shruti Mahambre, IIT Bombay UNSW Talk 06 Non-Functional Specs May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

Shruti Mahambre, IIT Bombay UNSW Talk 06 Reliability - Node B B1 B2 B3 B4 λ1 λ2 λ3 λ4 1/ λ M / M / 1 / n n λ May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

Shruti Mahambre, IIT Bombay UNSW Talk 06 Reliability - Link i Lij j i j 1 2 3 4 x1 x2 x3 Lij Overlay Phy. network May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

Event Dissemination Path Lo 1 3 L2 L3 L1 L10 S 2 4 L5 L4 L9 5 L6 L8 7 L7 8 6 May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

Per subscription per event type T1, T2, T3, T4 May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

Per subscription for all event types T1, T2, T3, T4 Tx Ty May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

All subscriptions for an event type T1, T2, T3, T4 S2 S3 May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

Reliability – Entire System May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

Reliability – Event Hierarchy Subscriber subscribes for Subtype P1(D1) T’ P2(B2) T S P3(B3) T P4(D4) Subscriber subscribes for Supertype T’ May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

Reliability – Composite Events May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

Shruti Mahambre, IIT Bombay UNSW Talk 06 Ongoing work Run Time Model Simulation of reliability parameter on Hermes (event based middleware developed at University of Cambridge -2004) Programming Model Specification for the QoS parameters Study of Conflicts in Parameters May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

Shruti Mahambre, IIT Bombay UNSW Talk 06 References P. Th.Eugster,P.A. Felber, R. Guerraoui, A. M Kermarrec, “The Many Faces of Publish/Subscribe, ACM Computing Surveys”, Volume 35, Issue 2, Pages 114-131, 2003 Patrick Th. Eugster, Richard Guerraoui, Joe Sventek, “Distributed Asynchronous Collections: Abstractions for Publish/Subscribe Interaction”, Elisa Bertino (Ed): ECOOP 2000, LNCS 1850,Pages 256-276, 2000 Gianpaolo Cugola, Elisabetta Di Nitta, Alfonso Fuggetta, “The JEDI event based infrastructure and its application to the development of OPSS WFMS”, IEEECS Log Number 107 430 Bill Segall, David Arnold, Julian Boot, Michael Henderson, Ted Phelps, “Content Based Routing with Elvin4”, In Proc. AUUG2K (June 2000) Antonio Carzaniga, “Architectures for an Event Notification Service Scalable to Wide-area Networks”, PhD Thesis. Politecnico di Milano. December, 1998 Peter Robert Pietzuch, “Hermes - A Scalable Event-Based Middleware”, PhD Thesis, Queens College, University of Cambridge, February 2004 Filipe Araujo, Luis Rodrigues, “On QoS-Aware Publish-Subscribe”, In Proc. of 22nd International Conference on Distributed Computing Systems Workshops, ICDCSW '02 Rsilvafi, “YANCEES - Yet Another Configurable Extensible Event Service”, Technical Report, University of California, Irvine, 2005 May 3, 2019 Shruti Mahambre, IIT Bombay UNSW Talk 06

Thank you !