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Feeding frenzy: selectively materializing users' event feeds

Published: 06 June 2010 Publication History

Abstract

Near real-time event streams are becoming a key feature of many popular web applications. Many web sites allow users to create a personalized feed by selecting one or more event streams they wish to follow. Examples include Twitter and Facebook, which a user to follow other users' activity, and iGoogle and My Yahoo, which allow users to follow selected RSS streams. How can we efficiently construct a web page showing the latest events from a user's feed? Constructing such a feed must be fast so the page loads quickly, yet reflects recent updates to the underlying event streams. The wide fanout of popular streams (those with many followers) and high skew (fanout and update rates vary widely) make it difficult to scale such applications.
We associate feeds with consumers and event streams with producers. We demonstrate that the best performance results from selectively materializing each consumer's feed: events from high-rate producers are retrieved at query time, while events from lower-rate producers are materialized in advance. A formal analysis of the problem shows the surprising result that we can minimize global cost by making local decisions about each producer/consumer pair, based on the ratio between a given producer's update rate (how often an event is added to the stream) and a given consumer's view rate (how often the feed is viewed). Our experimental results, using Yahoo!'s web-scale database PNUTS, shows that this hybrid strategy results in the lowest system load (and hence improves scalability) under a variety of workloads.

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    cover image ACM Conferences
    SIGMOD '10: Proceedings of the 2010 ACM SIGMOD International Conference on Management of data
    June 2010
    1286 pages
    ISBN:9781450300322
    DOI:10.1145/1807167
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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    Published: 06 June 2010

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    Author Tags

    1. social networks
    2. view maintenance

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    SIGMOD/PODS '10
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    SIGMOD/PODS '10: International Conference on Management of Data
    June 6 - 10, 2010
    Indiana, Indianapolis, USA

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    Cited By

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    • (2021)QuiCKProceedings of the 2021 International Conference on Management of Data10.1145/3448016.3457567(2517-2529)Online publication date: 9-Jun-2021
    • (2020)QuickPoint: Efficiently Identifying Densest Sub-Graphs in Online Social Networks for Event Stream DisseminationIEEE Transactions on Knowledge and Data Engineering10.1109/TKDE.2018.288143532:2(332-346)Online publication date: 9-Jan-2020
    • (2019)Location-Centric View Selection in a Location-Based Feed-Following SystemProceedings of the 13th ACM International Conference on Distributed and Event-based Systems10.1145/3328905.3329512(67-78)Online publication date: 24-Jun-2019
    • (2019)Piggyback Game: Efficient Event Stream Dissemination in Online Social Network SystemsIEEE Transactions on Parallel and Distributed Systems10.1109/TPDS.2018.286624230:3(692-709)Online publication date: 1-Mar-2019
    • (2019)A parallel data generator for efficiently generating "realistic" social streamsFrontiers of Computer Science: Selected Publications from Chinese Universities10.1007/s11704-018-8022-z13:5(1072-1101)Online publication date: 1-Oct-2019
    • (2018)Efficient Event Stream Dissemination in Online Social Networks Based on Community Detection2018 IEEE International Conference on Communications (ICC)10.1109/ICC.2018.8422653(1-6)Online publication date: May-2018
    • (2017)A social-aware caching algorithm for improving performance of online social network services in a multi-cloud environmentProceedings of the 3rd International Conference on Communication and Information Processing10.1145/3162957.3163024(384-388)Online publication date: 24-Nov-2017
    • (2017)Systems Applications of Social NetworksACM Computing Surveys10.1145/309274250:5(1-42)Online publication date: 26-Sep-2017
    • (2016)A Location- and Diversity-Aware News Feed System for Mobile UsersIEEE Transactions on Services Computing10.1109/TSC.2015.24363969:6(846-861)Online publication date: 1-Nov-2016
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