GlusterFS

GlusterFS Distribution

Below, we create a distributed volume using two bricks (XFS filesystems.) This spreads IO and files among two bricks.

# gluster peer status
No peers present
# gluster peer probe rhs-lab2
Probe successful
# gluster peer status
Number of Peers: 1

Hostname: rhs-lab2
Uuid: 6b6c9ffc-da79-4d24-8325-086d44869338
State: Peer in Cluster (Connected)
# gluster peer probe rhs-lab3
Probe successful
# gluster peer probe rhs-lab4
Probe successful
# gluster peer status
Number of Peers: 3

Hostname: rhs-lab2
Uuid: 6b6c9ffc-da79-4d24-8325-086d44869338
State: Peer in Cluster (Connected)

Hostname: rhs-lab3
Uuid: cbcd508e-5f80-4224-91df-fd5f8e12915d
State: Peer in Cluster (Connected)

Hostname: rhs-lab4
Uuid: a02f68d8-88af-4b79-92d8-1057dd85af45
State: Peer in Cluster (Connected)
# gluster volume create dist rhs-lab1:/data/dist rhs-lab2:/data/dist
Creation of volume dist has been successful. Please start the volume to access data.

# gluster volume info
 
Volume Name: dist
Type: Distribute
Volume ID: f9758871-20dc-4728-9576-a5bb5b24ca4f
Status: Created
Number of Bricks: 2
Transport-type: tcp
Bricks:
Brick1: rhs-lab1:/data/dist
Brick2: rhs-lab2:/data/dist

# gluster volume start dist
Starting volume dist has been successful

# gluster volume info
 
Volume Name: dist
Type: Distribute
Volume ID: f9758871-20dc-4728-9576-a5bb5b24ca4f
Status: Started
Number of Bricks: 2
Transport-type: tcp
Bricks:
Brick1: rhs-lab1:/data/dist
Brick2: rhs-lab2:/data/dist

# mount -t glusterfs rhs-lab1:/dist /mnt/dist

GlusterFS Mirroring

Below, we mirror data between two bricks (XFS volumes). This creates a redundant system and also allows for read performance to be improved.

# gluster volume create mirror replica 2 rhs-lab1:/data/mirror rhs-lab2:/data/mirror
Creation of volume mirror has been successful. Please start the volume to access data.
# gluster volume start mirror
Starting volume mirror has been successful
# gluster volume info mirror
 
Volume Name: mirror
Type: Replicate
Volume ID: 4edacef8-982c-46a9-be7e-29e34fa40f95
Status: Started
Number of Bricks: 1 x 2 = 2
Transport-type: tcp
Bricks:
Brick1: rhs-lab1:/data/mirror
Brick2: rhs-lab2:/data/mirror
# install -d /mnt/mirror
# mount -t glusterfs rhs-lab1:/mirror /mnt/mirror