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Central server-based social networks can suffer from overloading caused by social trends and make the service momentarily unavailable preventing users to access it when they most want it. Central server-based social networks are not adapted to face rapid growth of data or flash crowds. In this paper, the authors present a design for a scalable, elastic and secure Twitter-like social network application, called Bwitter, built on the top of a scalable transactional key/value datastore, such as Beernet or Scalaris. The application runs on a cloud infrastructure and is able to scale its resource usage up and down quickly to avoid overloading and resource wasting.
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