What is the purpose of the Preprocessing component in Zabbix Server?

The Preprocessing component in Zabbix Server is essential for managing how data is handled before it is stored in the database. Its primary purpose is to process incoming data from various sources, such as agents or external checks, and apply transformations or filters as needed to ensure that the data is in the correct format or meets specific criteria.

This processing can include actions like converting units, extracting specific fields from a log, filtering out unnecessary data, or applying functions to enhance the data quality or relevance. By doing this preprocessing, Zabbix helps streamline data management and ensures that only the necessary and correctly formatted data is stored. Consequently, this improves the overall efficiency of reporting and monitoring functions within the system.

The other choices describe functions that are handled by different components or aspects of Zabbix. For instance, storing historical data pertains to how Zabbix retains information over time for analysis and reporting, user requests are typically managed through the frontend interface or API, and managing server performance is more related to the overall system configuration and resource allocation.