Scalaのコンパイルを3倍速くした話The document discusses the history and features of Amazon's Elastic MapReduce (EMR) service. It mentions that in 2009 Hadoop was used with MySQL for analyzing large datasets, and that in 2010 Amazon launched EMR to make Hadoop easier to use on EC2. EMR supports the open-source Hadoop framework and makes it simple to set up Hadoop clusters without having to acquire and configure hardware. The docum
