Striping Across Four Storage Nodes With GlusterFS 3.2.x On Ubuntu 12.10 - Page 2
This tutorial exists for these OS versions
- Ubuntu 12.10 (Quantal Quetzal)
- Ubuntu 12.04 LTS (Precise Pangolin)
- Ubuntu 11.10 (Oneiric Ocelot)
- Ubuntu 9.10 (Karmic Koala)
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3 Setting Up The GlusterFS Client
client1.example.com:
On the client, we can install the GlusterFS client as follows:
apt-get install glusterfs-client
Then we create the following directory:
mkdir /mnt/glusterfs
That's it! Now we can mount the GlusterFS filesystem to /mnt/glusterfs with the following command:
mount.glusterfs server1.example.com:/testvol /mnt/glusterfs
(Instead of server1.example.com you can as well use server2.example.com or server3.example.com or server4.example.com in the above command!)
You should now see the new share in the outputs of...
mount
[email protected]:~# mount
/dev/mapper/server5-root on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
fusectl on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
/dev/sda1 on /boot type ext2 (rw)
server1.example.com:/testvol on /mnt/glusterfs type fuse.glusterfs (rw,allow_other,default_permissions,max_read=131072)
[email protected]:~#
... and...
df -h
[email protected]:~# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/server5-root
29G 1.1G 27G 4% /
udev 238M 4.0K 238M 1% /dev
tmpfs 99M 212K 99M 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 247M 0 247M 0% /run/shm
/dev/sda1 228M 24M 193M 11% /boot
server1.example.com:/testvol
116G 4.2G 106G 4% /mnt/glusterfs
[email protected]:~#
Instead of mounting the GlusterFS share manually on the client, you could modify /etc/fstab so that the share gets mounted automatically when the client boots.
Open /etc/fstab and append the following line:
vi /etc/fstab
[...] server1.example.com:/testvol /mnt/glusterfs glusterfs defaults,_netdev 0 0 |
(Again, instead of server1.example.com you can as well use server2.example.com or server3.example.com or server4.example.com!)
To test if your modified /etc/fstab is working, reboot the client:
reboot
After the reboot, you should find the share in the outputs of...
df -h
... and...
mount
4 Testing
Now let's create a big test file on the GlusterFS share:
client1.example.com:
dd if=/dev/zero of=/mnt/glusterfs/test.img bs=1024k count=1000
ls -l /mnt/glusterfs
[email protected]:~# ls -l /mnt/glusterfs
total 1024032
-rw-r--r-- 1 root root 1048576000 2012-12-17 17:31 test.img
[email protected]:~#
Now let's check the /data directory on server1.example.com, server2.example.com, server3.example.com, and server4.example.com. You should see the test.img file on each node, but with different sizes (due to data striping):
server1.example.com:
ls -l /data
[email protected]:~# ls -l /data
total 256008
-rw-r--r-- 1 root root 1045430272 2012-12-17 17:31 test.img
[email protected]:~#
server2.example.com:
ls -l /data
[email protected]:~# ls -l /data
total 256008
-rw-r--r-- 1 root root 1046478848 2012-12-17 17:27 test.img
[email protected]:~#
server3.example.com:
ls -l /data
[email protected]:~# ls -l /data
total 256008
-rw-r--r-- 1 root root 1047527424 2012-12-17 17:26 test.img
[email protected]:~#
server4.example.com:
ls -l /data
[email protected]:~# ls -l /data
total 256008
-rw-r--r-- 1 root root 1048576000 2012-12-17 17:30 test.img
[email protected]:~#
5 Links
- GlusterFS: http://www.gluster.org/
- GlusterFS 3.2 Documentation: http://download.gluster.com/pub/gluster/glusterfs/3.2/Documentation/AG/html/index.html
- Ubuntu: http://www.ubuntu.com/
About Falko Timme
Falko Timme is an experienced Linux administrator and founder of Timme Hosting, a leading nginx business hosting company in Germany. He is one of the most active authors on HowtoForge since 2005 and one of the core developers of ISPConfig since 2000. He has also contributed to the O'Reilly book "Linux System Administration".
