+Clusters are identified by a five-digit alphanumeric id (numbers and lowercase letters). There are 36 ^5^ = 60466176 possible cluster identifiers.
+
+* For automated tests purposes, use "z****"
+* For experimental/local-only/private clusters that won't ever be visible on the public Internet, use "x****"
+* For long-lived clusters, we recommend reserving a cluster id. Contact "info@curii.com":mailto:info@curii.com