Apache Spark is amazing when everything clicks. But if you havent seen the performance improvements you expected, or still dont feel confident enough to use Spark in production, this practical book is for you. Authors Holden Karau and Rachel Warren demonstrate performance optimizations to help your Spark queries run faster and handle larger data sizes, while using fewer resources.Ideal for software engineers, data engineers, developers, and system administrators working with large-scale data applications, this book describes techniques that can reduce data infrastructure costs and developer hours. Not only will you gain a more comprehensive understanding of Spark, youll also learn how to make it sing.With this book, youll explore:How Spark SQLs new interfaces improve performance over SQLs RDD data structureThe choice between data joins in Core Spark and Spark SQLTechniques for getting the most out of standard RDD transformationsHow to work around performance issues in Sparks key/value pair paradigmWriting high-performance Spark code without Scala or the JVMHow to test for functionality and performance when applying suggested improvementsUsing Spark MLlib and Spark ML machine learning librariesSparks Streaming components and external community packages

To the Hermitage tells two stories. The first is of the narrator, a novelist, on a trip to Stockholm and Russia for an academic seminar called the Diderot Project. The second takes place two hundred years earlier and recreates the journey the French philosopher Denis Diderot made to Russia at the invitation of Catherine the Great, a woman whose influence could change the path of history . . . Malcolm Bradbury's last novel is rich with his satirical wit, but it is also deeply personal and weaves a wonderfully wry self-portrait.

Forty-year-old university professor Stuart Treece is rather set in his ways, and in the midst of the changing attitudes of the '50s, his encounters with the younger generation are making him feel decidedly alien. When he falls disastrously in love with one of his students all his efforts to acclimatize are hilariously undermined. Timeless and brilliant, Eating People is Wrong is Malcolm Bradbury's first novel, and established him as a master of satire.

A novel about forgetfulness, about the pain that almost suffocates the possibility of existing; about being parents and being children; about care and love that go beyond loss.