Encyclopedia of Database Systems

2018 Edition
| Editors: Ling Liu, M. Tamer Özsu

Indexing in Pub/Sub Systems

  • Dongxiang Zhang
Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-8265-9_80629

Synonyms

Publish/subscribe systems; Publish/subscribe event systems

Definition

A publish/subscribe (pub/sub) system accepts subscriptions from a large number of subscribers and monitors a stream of incoming events. The subscribers are notified instantly when a newly arriving event matches their desires. When the number of subscriptions is very large, it is critical to ensure that the newly arrived event can be processed quickly so that users can be notified instantly. The problem becomes worse if there are many events. To support instant notification of subscribers and high throughput of incoming events, the subscriptions may have to be properly organized into an indexing structure.

Historical Background

Pub/sub systems have been extensively studied for over a decade. This is prompted by many applications such as real-time stock trading, online advertisements, complex event monitoring and E-commerce databases. In many systems, a subscription is represented as a boolean expression which...
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Recommended Reading

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Computer Science and EngineeringUniversity of Electronic Science and Technology of ChinaSichuanChina