# File group provider#

Trino can map user names onto groups for easier access control and resource group management. Group file resolves group membership using a file on the coordinator.

## Group file configuration#

Enable group file by creating an etc/group-provider.properties file on the coordinator:

group-provider.name=file
file.group-file=/path/to/group.txt


The following configuration properties are available:

Property

Description

file.group-file

Path of the group file.

file.refresh-period

How often to reload the group file. Defaults to 5s.

## Group files#

### File format#

The group file contains a list of groups and members, one per line, separated by a colon. Users are separated by a comma.

group_name:user_1,user_2,user_3