Big Data file formatsApache Spark supports many different data formats, such as the ubiquitous CSV format and the friendly web format JSON. Common formats used mainly for big data analysis are Apache Parquet and Apache Avro. In this post, we will look at the properties of these 4 formats — CSV, JSON, Parquet, and Avro using Apache Spark. CSV CSV files (comma-separated values) are usually used to exchange tabular data
CSVファイルフォーマットの解説：CodeZine
