The guest post from Kiyoto Tamura, developer evangelist at Treasure Data, discusses the benefits of building a unified logging layer using Fluentd, an open source data collector to unify logging infrastructure. It highlights four key properties of Fluentd: Unified Logging with JSON, Pluggable Architecture, Minimal Resources Required, and Built-in Reliability. The post also explains how Fluentd integrates with Datadog and provides step-by-step instructions on setting up the Datadog Agent to monitor Fluentd. Finally, it emphasizes the importance of visualizing and monitoring Fluentd's performance using a platform like Datadog.