Which feature allows for immediate notifications about critical systems in Splunk?

The feature that facilitates immediate notifications about critical systems in Splunk is scheduled alerts. Scheduled alerts allow users to configure rules that analyze incoming data on a set schedule and can trigger alerts when certain conditions are met. This can encompass a variety of scenarios, such as monitoring thresholds for system performance or detecting anomalies in log data. When the specified conditions are satisfied, the alert immediately notifies the relevant personnel, enabling rapid response to potential issues.

Real-time indexing is related to how data is processed upon ingestion into Splunk, but it does not inherently include the capability for notifications or alerts. Data models are designed to provide a structured representation of data for search and analysis purposes, while log monitoring refers more broadly to the practice of keeping an eye on logs rather than triggering alerts based on specific conditions. Therefore, while all the other features play critical roles in data management and analysis, it is the scheduled alerts that specifically provide the mechanism for immediate notifications regarding critical systems.