volume remote1
  type protocol/client
  option transport-type tcp
  option remote-host 127.0.0.1
  option remote-port 1500
  option remote-subvolume brick
end-volume


volume remote2
  type protocol/client
  option transport-type tcp
  option remote-host 127.0.0.1
  option remote-port 1600
  option remote-subvolume brick
end-volume

volume remote3
  type protocol/client
  option transport-type tcp
  option remote-host 127.0.0.1
  option remote-port 1700
  option remote-subvolume brick
end-volume

volume remote4
  type protocol/client
  option transport-type tcp
  option remote-host 127.0.0.1
  option remote-port 1800
  option remote-subvolume brick
end-volume

volume replicate1
  type cluster/replicate
  subvolumes remote1 remote2 
end-volume

volume replicate2
  type cluster/replicate
  subvolumes remote3 remote4
end-volume

volume dht
  type cluster/distribute
  subvolumes replicate1 replicate2
end-volume

volume wb
   type performance/write-behind
   option cache-size 120KB
   subvolumes dht
end-volume