def METHOD_NAME(benchmark_spec):
  """Prepare the virtual machines to run memtier against memcached.
  Args:
    benchmark_spec: The benchmark specification. Contains all data that is
        required to run the benchmark.
  """
  clients = benchmark_spec.vm_groups['client']
  server = benchmark_spec.vm_groups['server'][0]
  _InstallMemtier(clients[0])
  _InstallMemcached(server)
  memcached_server.ConfigureAndStart(server)
  memtier.Load(clients, server.internal_ip, memcached_server.MEMCACHED_PORT)