This book is an example-based tutorial that deals with Optimizing Hadoop for MapReduce job performance. If you are a Hadoop administrator, developer, MapReduce user, or beginner, this book is the best choice available if you wish to optimize your clusters and applications. Having prior knowledge of creating MapReduce applications is not necessary, but will help you better understand the concepts and snippets of MapReduce class template code.

Written in a friendly, example-driven Beginner's Guide format, there are plenty of step-by-step instructions and examples that are designed to help you get started with RavenDB. If you are a .NET developer, new to document-oriented databases, and you wish to learn how to build applications using NoSQL databases, then this book is for you. Experience with relational database systems will be helpful, but not necessary.

汇聚社区经验精华，阐述配置Hadoop集群运行最优MapReduce作业的方法Key Features原理与实践相结合，通过原理讲解影响MapReduce性能的因素透过实例一步步地教读者如何发现性能瓶颈并消除瓶颈，如何识别系统薄弱环节并改善薄弱环节讲解过程中融合了作者在优化实践过程中积累的丰富经验，具有很强的针对性既覆盖了系统层面的优化又覆盖程序层面的优化Book Description大数据时代，MapReduce的重要性不言而喻。Hadoop作为MapReduce框架的一个实现，受到业界广泛的认同，并被广泛部署和应用。尽管Hadoop为数据开发工程师入门和编程提供了极大便利，但构造一个真正满足性能要求的MapReduce程序并不简单。数据量巨大是大数据工作的现实问题，而对低响应时间的要求则时常困扰着数据开发工程师。 本书采用原理与实践相结合的方式，通过原理讲解影响MapReduce性能的因素，透过实例一步步地教读者如何发现性...