Performance

["Brian Taber" <btaber@xxxxxxxxxxxxx>]

I am new to ClusterFS and I am looking for a replacement for my NFS setup.
 I have configured a clusterfs server on top of a raid 5 array on 4 SATA
hard drives.  Directly I can get a speed of 72.3 MB/s weh I do a:

dd if=/dev/zero bs=1024 count=1000000 of=/data/1Gb.file

If I do the same test over NFSv3 I get performance of 14.1 MB/s

If I do the same test over the gluster mount, I get perfromance of 3.6 MB/s

Am I doing something wrong here?  How can I increase my performance to the
same or beyond my current NFS?

I setup the server with this config:

volume brick-ns
  type storage/posix
  option directory /gluster-ns
end-volume

volume brick
  type storage/posix
  option directory /data/gluster
end-volume

volume iothreads1    #iothreads can give performance a boost
   type performance/io-threads
   option thread-count 8
   subvolumes brick
end-volume

volume server
  type protocol/server
  subvolumes iothreads1 brick-ns
  option transport-type tcp/server     # For TCP/IP transport
  option auth.ip.iothreads1.allow 192.168.*
  option auth.ip.brick-ns.allow 192.168.*
end-volume


and setup a client with:

volume client1-ns
  type protocol/client
  option transport-type tcp/client
  option remote-host 192.168.200.201
  option remote-subvolume brick-ns
end-volume

volume client1
  type protocol/client
  option transport-type tcp/client
  option remote-host 192.168.200.201
  option remote-subvolume iothreads1
end-volume

volume bricks
  type cluster/unify
  subvolumes client1
  option namespace client1-ns
  option scheduler alu
  option alu.limits.min-free-disk  60GB              # Stop creating files
when free-space lt 60GB
  option alu.limits.max-open-files 10000
  option alu.order
disk-usage:read-usage:write-usage:open-files-usage:disk-speed-usage
  option alu.disk-usage.entry-threshold 2GB          # Units in KB, MB and
GB are allowed
  option alu.disk-usage.exit-threshold  60MB         # Units in KB, MB and
GB are allowed
  option alu.open-files-usage.entry-threshold 1024
  option alu.open-files-usage.exit-threshold 32
  option alu.stat-refresh.interval 10sec
end-volume

volume writebehind   #writebehind improves write performance a lot
  type performance/write-behind
  option aggregate-size 131072 # in bytes
  subvolumes bricks
end-volume


When trying the