
[[ref-daemon-config-files-telemetryd]]
= Telemetryd
:description: Learn about telemetryd in OpenNMS {page-component-title}, which processes telemetry data received from nodes.

Processes xref:operation:deep-dive/telemetryd/introduction.adoc[telemetry] data received from nodes.

.Telemetryd configuration file overview
[options="header"]
[cols="2,3,1,1"]
|===
| File
| Description
| Reload Event
| Restart Required

| telemetryd-configuration.xml
| Configure telemetry listeners and adapters.
| yes
| no

| telemetryd-adapters/*.groovy
| Groovy scripts for processing telemetry data.
| yes
| no

| org.opennms.features.flows.classification.cfg
| Rules for classifying flow data.
| yes
| no

| org.opennms.features.flows.persistence.elastic.cfg
| Configuration for offloading flow data to Elasticsearch.
| no
| yes

| org.opennms.features.flows.persistence.kafka.cfg
| Optional configuration for forwarding flow data to a Kafka topic.
| no
| yes

| elastic-credentials.xml
| Credentials for connecting to Elasticsearch nodes.
| no
| no
|===

.Telemetryd log file overview
[options="header"]
[cols="2,3"]
|===
| File
| Description

| telemetryd.log
| Logs relating to telemetryd server events.
|===
