11.2. Setting Multiple Volume Option

A group configuration file is a file used to define and customize volume options. There are some predefined group configuration files for specific workload patterns like negative lookup cache, virtualization, metadata cache and gluster-block.
The parameters defined in the file can then be applied to a volume as a group, rather than setting one parameter at a time.

Creating a group configuration file

  1. Create a new file in the /var/lib/glusterd/groups/ directory. 
    # touch /var/lib/glusterd/groups/filename
  2. Add the parameters and values that you want to set on the volume to the created file as key-value pairs, placing each parameter on a new line: 
    domain1.key1=value1
domain1.key2=value2
domain2.key3=value3
    For example, 
    changelog.changelog=on
client.event-threads=6
cluster.brick-multiplex=on

Adding configurations to volumes

Run the following command to apply the configurations in the group file to specific volumes: 
# gluster volume set volname group filename
For example, 
# gluster volume set volume1 group virt
# gluster volume set volume2 group virt
# gluster volume set volume3 group dbgroup

Note

The configuration file created should be placed in all the hosts of the trusted storage pool under /var/lib/glusterd/groups/. This can be achieved with the help of gdeploy configuration file.