Mirrorselect

The program provides a nice interface to set the GENTOO_MIRRORS variable and the Gentoo rsync mirror.

Emerge
Install :

Select the Gentoo source mirror(s)
Interactively find Gentoo source mirrors (and set or update the GENTOO_MIRRORS variable):

Notice that a backup copy of will be created by  before updating it.

Users can also specify a country (United States of America, for example):

The following command finds the 3 fastest servers by downloading 100K from each; it will use all available mirrors in the list:

Options
Please consider using one of these additional options to limit the available mirrors in the list it tests.

Server type selection:

Select the Gentoo rsync mirror
The default configuration of the Gentoo repository comes from and is located at. However settings in override it.

will not create the file automatically. If that file does not exist, will default to using the old  SYNC variable which has been deprecated. In order to avoid this make sure Portage is up to date and copy the file from Portage's  (library) location to the  (configuration) location:

Then find a Gentoo rsync mirror with (make sure to use  ):

Just navigate to the mirrors of choice and press to select one (or more) mirrors.

Troubleshooting
In case of problems with rsync mirror it might help to check the mirrorstats.