November 9, 2012 – Social media giant Facebook has detailed and opened up its customized big data cluster scheduling solution Corona, an alternative to those same functions from MapReduce.

For its big data scaling and scheduling, Facebook utilized MapReduce from Apache Hadoop as the foundation that “served us well for several years,” according to a Facebook post from its engineers. However, Facebook engineers felt they started to hit a wall with scalability limitations, particularly with the MapReduce task tracker features and the varied nature of some data load scheduling. 

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