What does the "Zabbix front-end" use to display historical data?

The Zabbix front-end utilizes the underlying database containing the collected monitoring statistics to display historical data. This database is where all the data collected from hosts, items, triggers, and events are stored. When users query historical data through the front-end interface, it makes direct queries to this database to retrieve and present the information in a user-friendly format.

This process is crucial because the front-end needs real-time access to the most accurate and comprehensive data available, which is maintained in the database. By using the data stored in the database, Zabbix ensures that users have access to historical performance metrics, graphs, and reports that reflect the current state of their monitored systems. This integration between the front-end and the database allows for dynamic and actionable insights into system performance over time.

Other methods such as API requests to external databases, static JSON files, or temporary cache files do not serve as the primary means for the front-end to access and display historical data, as they typically involve additional complexity or limitations in terms of data availability and real-time access.