Amazon SOA-C03 Exam - Topic 5 Question 23 Discussion

ALB access logs contain request-level records that include byte counts and target information. To report bytes sent to and received from each target group member, the CloudOps engineer should enable ALB access logging and store the logs in Amazon S3. Then Amazon Athena can query the log files and aggregate received_bytes and sent_bytes by the target address and port fields. AWS Athena documentation provides table definitions for ALB access logs and supports querying those logs directly from S3. Installing the CloudWatch agent on targets is unnecessary because the required data is in ALB logs, not instance OS metrics. The ProcessedBytes CloudWatch metric is useful for aggregate load balancer traffic but does not provide per-target member reporting. Grouping by client port is also wrong because the requirement is per target member.