Question 400
During a security analytics acceptance test, operators report: Fresh log packets appear in receiver statistics but FortiView graphs remain behind during a burst of traffic from several devices. What preventive practice should be standardized for this FortiAnalyzer workflow?
Explanation
Correct Answer
This safeguard directly addresses log ingestion versus analytics indexing delay: Alert on indexing latency separately from raw log receipt and maintain ingestion headroom for bursts. The risk being prevented is: Successful receipt of raw logs does not ensure that parsing and SQL analytics indexing have already caught up with incoming volume. A safeguard aimed at another fault would not control this issue.
Incorrect Answers
Archived raw log files and indexed Analytics records serve different retrieval paths and can have distinct retention policies. “Maintain separate Analytics and Archive retention requirements instead of treating all stored logs as equally searchable” would remedy that alternative situation, but it would not correct the present issue: successful receipt of raw logs does not ensure that parsing and SQL analytics indexing have already caught up with incoming volume.
“Set monitoring thresholds for critical log categories independently of overall device log volume” is the supported response when log categories and subtypes are not interchangeable; system events do not substitute for session traffic telemetry. Here the decisive response is “Alert on indexing latency separately from raw log receipt and maintain ingestion headroom for bursts”, so that different intervention does not meet the stated requirement.
Clock drift or mismatched time-zone handling can distort apparent event order across devices despite valid received messages. “Monitor source clock offsets and document event-time versus receipt-time treatment during investigations” applies to that other condition. The reported evidence is fresh log packets appear in receiver statistics but FortiView graphs remain behind during a burst of traffic from several devices; this alternative would address the wrong dependency.