def delete(options = {})
      return each({ match: '*', count: 500, max_iterations: 1_000_000, batch_size: 500 }.merge(options)) do |keys|
        @connection.del(*keys)
      end
    end
def delete(options = {})
      return each({ match: '*', count: 500, max_iterations: 1_000_000, batch_size: 500 }.merge(options)) do |keys|
        @connection.del(*keys)
      end
    end
Deletes all keys created by the factory. By defaults will iterate at most of 500 million keys
 @param [Hash] options accepts the options as given in each
 @see Redstruct::Factory#each