Metrics processing
An AWS Glue job is configured to perform ETL operation on the metrics log data present in the S3 bucket containing the raw logs. The ETL operation structures the metric data present in the log files into a single database with several tables. For details, see Glue table schemas in the Querying metrics with Athena section. The processed data is written into the MetricsEtl
S3 bucket, which contains the metric log data transformed and partitioned through ETL in the previous steps. The data is made available via AWS AWS Glue Data Catalog, a persistent technical metadata store for analytics users to discover and prepare the data. Also, you can immediately search and query cataloged data using Amazon Athena, Amazon EMR