def node_aliases cluster
      Hash[config[cluster]["servers"].map(&:split).each {|o| o[0]=o[0].split(":")[0..1].join(":")}.map(&:reverse)]
    end
def node_aliases cluster
      Hash[config[cluster]["servers"].map(&:split).each {|o| o[0]=o[0].split(":")[0..1].join(":")}.map(&:reverse)]
    end
https://github.com/twitter/twemproxy/blob/master/notes/recommendation.md#node-names-for-consistent-hashing