The following command sets a new epoch for the directory .mfg.
 The master replica is in .paris_ch, and read-only replicas are in
 .chicago1_ch, .seattle_ch, and .ny1_ch. The new replica set excludes
 the replica in .ny1_ch.

 dns> set directory .mfg to new epoch master .paris1_ch, -
 _> read-only .chicago1_ch, read-only .seattle_ch, exclude .ny1_ch