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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
take a look at snmp and librenms https://www.librenms.org/ I have been using this for years and it has never let me down. You can even then import data into Grafana if you want.
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