Elastic Stack (commonly known as ELK Stack) is a popular platform for storing and analyzing logs, offering two main approaches: "schema on read" and "schema on write." Schema on read allows users to apply structure to logs at search time, enabling ad hoc exploration but requiring repeated field extraction for ongoing reporting and dashboarding. Conversely, schema on write structures logs at the time of ingestion, which speeds up queries and aggregations by storing logs in a structured format, providing significant advantages for historical queries, real-time anomaly detection, and metrics correlation. This method also allows for better data quality verification, granular access control, and potentially lower storage needs by filtering unnecessary data upfront. The choice between these approaches depends on specific use cases and resource considerations, with Elastic Stack offering support for both methods to optimize workflows for different logging needs.