David M. Lentz's article explores methods for collecting and analyzing Amazon Elastic File System (EFS) metrics and logs to better understand their impact on application performance. The article discusses using the EFS console for basic monitoring and CloudWatch for more advanced metric visualization and alerting, including setting up custom dashboards and alarms. It also covers programmatic access to metrics via the CloudWatch API, with examples of using AWS SDKs and the CLI for integration into processes or applications. Additionally, the article highlights Linux tools for collecting client-specific metrics and logging EFS file system activity, detailing how these tools can identify changes that may indicate performance issues or security concerns. The use of AWS logging services, such as CloudWatch Logs and VPC Flow Logs, is explained for gathering and analyzing log data from EFS clients, while non-AWS tools like auditd and rpcdebug are recommended for monitoring file system changes at the host level. The piece concludes by mentioning that the upcoming part of the series will discuss integrating this data with Datadog for comprehensive stack monitoring.