no-herd maintainer-needed@gentoo.org SheerDNS was written to be a simple replacement master DNS server that can be used where atomic updates are required. Because it stores each record in a small file, updating records does not require the sheerdns process to be notified or restarted. Each update is immediately available and served as-is. SheerDNS is extremely light-weight, simple, and fast, and written with security in mind.