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searxng
SearXNG is a free internet metasearch engine which aggregates results from various search services and databases. Users are neither tracked nor profiled.
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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.
For instance, here is my 1U Raspberry Pi 4 server. It has two 8 TB drives attached via USB 3 which are mirrored via raidframe, and it can do a full 200 MB/sec per drive. Since it's powered directly from the case's power supply, and since the drives don't draw power from the Pi, there are no problems. It's colocated and has been up for 195 days running DNS, email, SearXNG and all sorts of other things.
Straight out of the box, the image wouldn't boot, said that start.elf was invalid, so I went to https://github.com/pftf/RPi4/releases as suggested in the Readme.md file in the EFI partition. I installed that (version 1.34) over the existing EFI partition and tried again. That booted up the kernel, but it apparently died when it enabled the interrupt controller. The last messages are about armgic0.