Since Athena only reads one-fourth of the file, it scans just 0.25TB of data from S3. But, in this case, because Parquet is columnar, Athena can read only the column that is relevant for the query being run. Because the query in question only references a single column, Athena reads only that column and can avoid reading three-fourths of the file. If you compress your file and also convert it to a columnar format like Apache Parquet, achieving 3:1 compression, you would still end up with 1 TB of data on S3. Athena has to scan the entire file again, but because it’s three times smaller in size, you pay one-third of what you did before. The same query on this file would cost $5. In this case, you would have a compressed file with a size of 1 TB. If you compress your file using GZIP, you might see 3:1 compression gains. (Price for 3 TB scanned is 3 * $5/TB = $15.) Running a query to get data from a single column of the table requires Amazon Athena to scan the entire file because text formats can’t be split. Ĭonsider a table with 4 equally sized columns, stored as an uncompressed text file with a total size of 3 TB on Amazon S3. Visit the Lambda pricing page for details. Lambda functions invoked by federated queries are subject to Lambda’s free tier. Such queries also invoke AWS Lambda functions in your account, and you are charged for Lambda use at standard rates. SQL queries on federated data sources (data not stored on S3) are billed per terabyte (TB) scanned by Athena aggregated across data sources, rounded up to the nearest megabyte with a 10 megabyte minimum per query, unless Provisioned Capacity is used.For details, visit the AWS Glue pricing page. If you use the AWS Glue Data Catalog with Athena, you are charged standard Data Catalog rates.See Amazon S3 pricing for more information. By default, SQL query results and Spark calculation results are stored in an S3 bucket of your choice and billed at standard S3 rates. You are billed by S3 when your workloads read, store, and transfer data.By default, query results are stored in an S3 bucket of your choice and are also billed at standard S3 rates. You are charged standard S3 rates for storage, requests, and data transfer. There are no additional storage charges for querying your data with Athena. Athena queries data directly from Amazon S3.
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