throttler is a great word, but if this should go open source, then there's a dozen or more throttler named repos.

This service observes replication lag on MySQL servers (maybe someday on other datastores?) and serves "may I write now" questions from apps.

Listing below some ideas for names. Please 👍 / 👎

The choice of a name is surprisingly important at this time, since there's going to be some internal infrastructure (puppet, deployments, CI) that will suffer from a later name change.