A variety of details can be gathered about GFS using the gfs_tool command. Typical usage of the gfs_tool command is described here.
gfs_tool counters MountPoint
The counters action flag displays statistics about a file system. If -c is used, the gfs_tool command continues to run, displaying statistics once per second.
Displaying Space Usage
gfs_tool df MountPoint
The df action flag displays a space-usage summary of a given file system. The information is more detailed than a standard df.
Displaying Extended Status
gfs_tool stat File
The stat action flag displays extended status information about a file.
Specifies the file system to which the action applies.
Specifies the file from which to get information.
The gfs_tool command provides additional action flags (options) not listed in this section. For more information about other gfs_tool action flags, refer to the gfs_tool man page.