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Cassandra at eBay

Recommendation and personalization systems are an important part of many modern websites. Graphs provide a natural way to represent the behavioral data that is the core input to many recommendation algorithms. Thomas Pinckney and his colleagues at Hunch (recently acquired by eBay) built a large scale recommendation system, and then ported the technology to eBay.

Thomas will be discussing how his team uses Cassandra to provide the high I/O storage of their fifty billion edge graphs and how they generate new recommendations in real time as users click around the site.



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  • Josh H.

    The presentation was at a respectable level of detail and the focus on use case was refreshing. Recommender systems are of topical interest so I am grateful to the eBay team who gave their time to show us what they've done and to field questions, even staying late beyond when they had to go home!

    December 4, 2012

  • James M.

    The session was very informative. When will the deck be posted?

    December 4, 2012

  • Adam D.

    Any slides to share from teh presentation?

    December 3, 2012

  • Ruijie

    very interesting and informative. I think it's more like a technical challenge. very useful for similar projects in the future.

    December 3, 2012

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