An internal application emits logs with custom delimiters, headers, and timestamp formats.
Define the format before the crawler attempts to infer the table schema.
Which configuration is most appropriate?
Create a Glue Custom Classifier and set its priority for the crawler before discovery.
Detailed explanation
A role name identifies a principal and is not a data-classification rule.
A role name identifies a principal and is not a data-classification rule.
Event selectors control audit logging and do not classify application log files.
Event selectors control audit logging and do not classify application log files.
A storage class does not identify delimiters, headers, or timestamps.
A storage class does not identify delimiters, headers, or timestamps.
A custom pattern teaches the crawler to recognize the proprietary format and infer the intended schema.
A custom pattern teaches the crawler to recognize the proprietary format and infer the intended schema.
Check official documentation
Compare the following points with the official documentation.
AWS Glue Custom Classifier、Grok・XML・JSON・CSV分類子の公式説明を確認する。
What to confirm
分類子と保存クラス・IAMロールの役割を区別できる。
Key points
- Custom Classifier
- Crawler priority
- Grok
- Data format
Notes
- Environment: AWS公式DEA-C01試験ガイドと各サービスの公式ドキュメントの確認
- Confirm current AWS service behavior in the official DEA-C01 documentation.
Foundation review
Format recognition
Correct classification is a prerequisite for reliable columns and partitions.
Sample coverage
Use representative files and test ambiguous records before publishing the catalog table.