Using AWS Glue, you can automatically convert large sets of CSV files stored in Amazon S3 into more efficient Parquet format as part of the ETL process without writing any conversion code.
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AWS Glue is a fully managed extract, transform, and load (ETL) service that makes it simple and cost-effective to categorize data, clean it, enrich it, and move it reliably between various data stores. AWS Glue can read data from a variety of data sources including Amazon S3, and transform it into a columnar format like Parquet, which is more space-efficient and faster for analytics, without the need to write any conversion code. This is because AWS Glue provides built-in transforms, and also supports an environment for developing custom ETL code when needed.
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