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Foundations

Synthetic data for event and log pipelines Logs vs metrics vs events Structured logging: from plain text to JSON Streaming vs bulk: live vs sample mode

Formats

Log and event formats: a field guide Windows Event Log & Sysmon CEF format: header and extension LEEF format: header and delimiter syslog format: PRI, RFC 3164 vs RFC 5424 NDJSON format: newline-delimited JSON OCSF format: classes and activities ECS fields: the Elastic Common Schema Apache & Nginx access logs: CLF and Combined AWS CloudTrail log format: the Records envelope Suricata EVE JSON format: event_type and alerts auditd log format: multi-record events

Realism

Realistic test data: behaving like production Simulate traffic patterns: peaks and bursts Simulate user sessions: state machines Correlated events: shared IDs and event.sequence Generate realistic fake data: skewed values Replay logs with fresh timestamps

Delivery

Deliver synthetic data to a real backend Generate logs for OpenSearch Generate test data for Kafka Generate test data for ClickHouse Send test data to an API endpoint Send syslog to a collector over TCP or UDP Output formatters: a shape per destination

Scenarios

Synthetic test data: use cases Test Data Pipeline End to End SIEM Test Data: Index Windows Security Events in OpenSearch Test Sigma Rules with Synthetic Attack Telemetry Seed a Database with Realistic Test Data Generate Realistic Load Test Data for an API Generate Clickstream Data for ClickHouse IoT Test Data: Synthetic Sensor Telemetry Alert Simulation: Scheduled Telegram Alerts

Deliver synthetic data to a real backend

Deliver generated events to the backend you actually use — OpenSearch, Kafka, ClickHouse, HTTP, syslog collectors — with the right format per destination.

Generating events is one stage; delivering them to a real backend is the next. Eventum fans out the same stream to one or more destinations in parallel, formatting per destination. This track shows how to deliver synthetic data to the systems you run.

Generating logs for OpenSearch

Index a realistic log stream into OpenSearch with the bulk API.

Generate test data for Kafka

Produce a continuous, realistic event stream to a Kafka topic.

Generate test data for ClickHouse

Insert a continuous, time-aware event stream into ClickHouse over its HTTP interface.

Send test data to an API endpoint

Send a continuous, realistic event stream to any HTTP endpoint, webhook receiver, or ingest API.

Send syslog to a collector

Ship a generated syslog stream to a collector or SIEM over UDP or TCP.

Output formatters

Shape the same event stream per destination — one line per event, a single array, or a custom envelope.

Replay logs with fresh timestamps

How to replay logs with fresh timestamps in Eventum — take a captured log file and play it back with current timestamps instead of generating events from scratch.

Generate logs for OpenSearch

Generate a realistic log stream and index it into OpenSearch over the bulk API, authenticated with encrypted secrets — no real traffic or production data required.