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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.
I think we might need to look into it too at some point. I was using thing called netxms (https://www.netxms.org/) in my system but that was rather reactive approach. It was looking into the logs for me, tracking for SCSI senses, latencies, RAID degraded, etc. If you see the last in the log, you are already pretty much close to getting screwed. Still, it's a good open-source solution I inherited from the previous admin. Helped us a lot.
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