Glue and EMR

Results from Glue or EMR jobs, as well as intermediate processing data, should typically be stored in S3. Let me create a diagram showing the common data storage patterns:

Here's the recommended approach for storing different types of data:

1. Raw Data:

   • Store in S3 raw data bucket

   • Maintain original format

   • Apply appropriate retention policies

2. Intermediate/Temporary Data:

   • EMR: Use HDFS for processing, then move final results to S3

   • Glue: Uses temporary storage in S3 automatically

   • Use staging buckets with short retention periods

3. Process Results:

   • Store in dedicated S3 results bucket

   • Use appropriate file formats (Parquet, ORC)

   • Implement partitioning strategy

   • Apply compression

   • Consider access patterns

Best practices include:

• Clear bucket organization (raw, staging, processed)

• Lifecycle policies to manage storage costs

• Appropriate data formats for query performance

• Partitioning for query efficiency

• Security controls at each stage

Remember to set up appropriate lifecycle rules to clean up temporary/intermediate data and manage storage costs effectively.