Hi,
There are now DNS aliases for the fast database servers, under
fastdb.toolserver.org. For example, if you currently connect to
enwiki-p.db.toolserver.org, connect to
enwiki-p.fastdb.toolserver.org
instead to use the fast server.
(For now only enwiki has a fast server, but we will be adding them for other
clusters in the next few weeks.)
- river.