Meaning
Blind spots in a monitoring stream occur when sensors fail to capture or transmit activity during a specific window of time. A telemetry gap represents a period of missing data that makes it impossible to know what happened within a system. These interruptions are often caused by network failures, software crashes, or deliberate tampering.
Identifying the start and end of the gap is the first step in a forensic investigation.
Data Absence
Missing records create uncertainty that can undermine the validity of an audit or a report. When a telemetry gap is present, any conclusions drawn from the remaining data must be qualified. The inability to prove that a specific event did not occur is a major weakness.
Records of the failure itself are sometimes the only evidence available. Lack of data in one area often masks activity in another.
Visibility Loss
Operational risks increase when the leadership team can no longer see the status of their systems. A telemetry gap prevents the detection of errors or security breaches as they happen. This delay in response can lead to greater damage or longer downtime for the service.
Restoration Effort
Investigating the cause of the missing data requires a review of the infrastructure and the logs of the monitoring system. A telemetry gap is often a symptom of a larger problem that needs to be addressed. Once the cause is found, the team must work to prevent a recurrence of the failure.
The cost of the gap includes the loss of information and the time spent on the recovery.