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Answer: Use AWS Glue crawlers to automatically discover and populate schemas into the AWS Glue Data Catalog.
AWS Glue crawlers are designed to automatically discover schemas from data stored in S3 and populate them into the AWS Glue Data Catalog, ensuring that the schemas are accurately identified and cataloged.
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Consider a scenario where you need to discover schemas from a data lake stored in S3 using AWS Glue, what steps would you take to ensure that the schemas are correctly identified and populated into the AWS Glue Data Catalog?
A
Manually inspect each file in the S3 bucket and enter schema information into the AWS Glue Data Catalog.
B
Use AWS Glue crawlers to automatically discover and populate schemas into the AWS Glue Data Catalog.
C
Write a custom ETL job to extract schema information and update the AWS Glue Data Catalog.
D
Assume that the schemas are already known and manually enter them into the AWS Glue Data Catalog.