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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.
There is a guide somewhere out there on how to set it up directly on Synology. I just looked for it again but couldn't. I remember you have to set up ssh on Synology, ssh in as root, create a few folders here and there, install acme.sh, configure the appropriate folder/file privileges, etc. It may be a simpler solution, but I felt much more at ease with messing with the pi.
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