I have used Cribl for log volume reduction with SIEM tools including Splunk, Sentinel, and Elastic. The raw logs contained a lot of noise, and Cribl helped me filter unnecessary logs, drop low-value fields, reduce repetitive logs, and remove unused attributes. I achieved 40 to 80% reduction in existing volume, which resulted in faster searches and good cost savings.
Cribl helped me route the same log streams to multiple destinations based on conditions I wanted to implement. Firewall logs were sorted with error messages. Whenever I received firewall messages, different types of traffic were allowed or denied, and there were threats from malware, scans, IPS, VPN connections, and authentication failures. I added context to the logs that was useful for SOC teams, including geo-location based on asset owners and application names. Since firewall logs were highly verbose and expensive to ingest into the SIEMs, I used Cribl to parse and transform them into structured fields, enriching the geo and asset context. I also dropped noise from the traffic we received and routed only threat and deny logs to the SIEM while storing the rest in S3 for long-term analysis.
Whenever I received high volume log metrics, Cribl proved to be the best solution. Using Cribl, I processed millions of data per second from various sources including firewalls, Kubernetes clusters, cloud platforms, and Prometheus, which is one of the primary sources from which I receive data. Cribl efficiently handles high-volume logs and metrics through horizontal scaling, easy filtering, smart sampling, metric cardinality reduction, and tiered routing. This ensures performance, cost control, and reliable observability even at massive scale. I primarily worked on the scaling part, including auto-scaling, and I also used load balancers to balance the load between worker nodes and the leader node.
Cribl reduces data complexity by normalizing log formats, handling schemas, flattening nested data, and reducing high cardinality fields. I worked with instances where I had different JSON files and set cardinality fields including request ID, session ID, and pod UID. By applying conditional parsing, flattening JSON nesting files, and removing high cardinality fields, I simplified downstream analytics and reduced ingestion cost by almost 60%. In our projects, each team works on particular domains, and I was specifically working with load balancing, auto-scaling, and routing data to destinations. Cribl is one of the most reliable solutions I have worked with, and it has provided a user-friendly experience. Whenever I wanted to access data from years back to check for seasonality impact, Cribl helped me accomplish this. I believe that if this feature works well, the other features will also work seamlessly.