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OpenMediaVault
openmediavault is the next generation network attached storage (NAS) solution based on Debian Linux. Thanks to the modular design of the framework it can be enhanced via plugins. openmediavault is primarily designed to be used in home environments or small home offices.
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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.
Your current PC looks very decent for a lab. Proxmox on it, then one Linux VM with Docker, another VM for NAS with something lite and easy like openmediavault: https://www.openmediavault.org/ or Starwinds NAS: https://www.starwindsoftware.com/san-and-nas and Plex separately. And other stuff in VMs or containers.