knot-resolver - 3.2.1-3 main

The Knot DNS Resolver is a caching full resolver implementation
written in C and LuaJIT, including both a resolver library and a
daemon. Modular architecture of the library keeps the core tiny and
efficient, and provides a state-machine like API for
extensions. There are three built-in modules - iterator, cache,
validator, and many external.
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The Lua modules, switchable and shareable cache, and fast FFI
bindings makes it great to tap into resolution process, or be used
for your recursive DNS service. It's the OpenResty of DNS.
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The server adopts a different scaling strategy than the rest of the
DNS recursors - no threading, shared-nothing architecture (except
MVCC cache that may be shared). You can start and stop additional
nodes depending on the contention without downtime.