= Gluster

         ------------------------
         |                      |
    192.168.0.11           192.168.0.12
 |Gluster Server1|      |Gluster Server2|
 |Gluster Client1|      |Gluster Client2|


== Install packege Gluster

> aptitude install libfuse-dev flex bison byacc libdb4.6-dev 
> wget http://ftp.gluster.com/pub/gluster/glusterfs/2.0/LATEST/glusterfs-2.0.6.tar.gz
> tar zxvf glusterfs-2.0.6.tar.gz
> cd glusterfs-2.0.6
> make 
> make install
> ldconfig
> glusterfs --version

= Configure Gluster Server

> mkdir /etc/glusterfs
> vi /etc/glusterfs/glusterfsd.vol

volume posix
  type storage/posix
  option directory /data/export
end-volume

volume locks
  type features/locks
  subvolumes posix
end-volume

volume brick
  type performance/io-threads
  option thread-count 8
  subvolumes locks
end-volume

volume server
  type protocol/server
  option transport-type tcp
  option auth.addr.brick.allow *
  subvolumes brick
end-volume


> mkdir -p /data/export
> /etc/init.d/glusterfsd start


= Configure Gluster client

> vi /etc/glusterfs/glusterfs-client.vol
volume remote1
  type protocol/client
  option transport-type tcp
  option remote-host 192.168.0.11
  option remote-subvolume brick
end-volume

volume remote2
  type protocol/client
  option transport-type tcp
  option remote-host 192.168.0.12
  option remote-subvolume brick
end-volume

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

volume writebehind
  type performance/write-behind
  option window-size 1MB
  subvolumes replicate
end-volume

volume cache
  type performance/io-cache
  option cache-size 512MB
  subvolumes writebehind
end-volume


> modprobe fuse
> mount -t glusterfs /etc/glusterfs/glusterfs-client.vol /mnt
> echo "jun" > /mnt/test.txt

= check on both gluster server
> ls -al /data/export/


= Split brain
the file won't sync. Once the file be edited, the file edited as newest will be sync to other server.