You can expand volumes, as needed, while the trusted storage pool is online and available. For example, you might want to add a brick to a distributed volume, thereby increasing the distribution and adding to the capacity of the Red Hat Storage volume.
Similarly, you might want to add a group of bricks to a distributed replicated volume, increasing the capacity of the Red Hat Storage volume.
Note
When expanding distributed replicated and distributed striped volumes, you need to add a number of bricks that is a multiple of the replica or stripe count. For example, to expand a distributed replicated volume with a replica count of 2, you need to add bricks in multiples of 2 (such as 4, 6, 8, etc.).
To expand a volume
- From any server in the trusted storage pool, probe the server to which you want to add the new brick using the following command:
# gluster peer probeHOSTNAMEFor example:# gluster peer probe server4 Probe successful
- Add the brick using the following command:
# gluster volume add-brickVOLNAME NEW-BRICKFor example:# gluster volume add-brick test-volume server4:/exp4 Add Brick successful
- Check the volume information using the following command:
# gluster volume infoThe command displays information similar to the following:Volume Name: test-volume Type: Distribute Status: Started Number of Bricks: 4 Bricks: Brick1: server1:/exp1 Brick2: server2:/exp2 Brick3: server3:/exp3 Brick4: server4:/exp4
- Rebalance the volume to ensure that files are distributed to the new brick.You can use the rebalance command as described in Section 10.5, “Rebalancing Volumes”.