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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.
If you are paranoid about a particular DNS server knowing your requests (but not paranoid enough to just use Tor entirely), the alternative will be just running a recursive resolver where you're running that PHP file. This exposes your server IP to the nameserver, but that's it, no extra third parties are involved. Or take it to the next level by running Tor there and forwarding plain DNS requests through it.
NOTE:
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Hence, a higher number means a more popular project.