What is Splunk, and what is it primarily used for? [Intermediate]
Answer
Splunk is a platform for ingesting, indexing, searching, analyzing, and alerting on machine data, especially logs and events. It is primarily used for log analytics, security analytics, audit, troubleshooting, and operational intelligence.
Technical explanation
Splunk can ingest many data types, but its strength is searchable event data with powerful SPL queries.
It is commonly used for security investigations, compliance retention, incident debugging, and business-event analytics.
Because ingest and retention can be expensive, data onboarding and filtering strategy are important.
Hands-on example
Example: during a checkout incident, search Splunk for index=app sourcetype=checkout service=checkout trace_id=<id>. Use the trace ID from Grafana or OpenTelemetry to find exact error logs, then aggregate by error_code and deployment_version.
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