raffaele on Nostr: In the graph, the CPU of a Solr server serving an application hammered badly by ...

In the graph, the CPU of a Solr server serving an application hammered badly by crawlers shows improvement after the introduction of an Altcha¹ captcha.
Altcha can be fully self-hosted: you need to import a minimal js for the widget, then implement the challenge creation and validation on your server side.
It is less effective than Anubis but also less intrusive and more customizable.
It works, until the next residential botnet learns to solve it.

¹ https://altcha.org/