Displaying Gfs Tunable Parameters - Red Hat ENTERPRISE LINUX 5 - GLOBAL FILE SYSTEM Manual

Chapter 3. Managing GFS
• If a GFS file system has been mounted manually with the mount command, be sure to unmount the
file system manually with the umount command before rebooting or shutting down the system.
If your file system hangs while it is being unmounted during system shutdown under these
circumstances, perform a hardware reboot. It is unlikely that any data will be lost since the file system
is synced earlier in the shutdown process.

3.5. Displaying GFS Tunable Parameters

There are a variety of parameters associated with a GFS file system that you can modify with the
gfs_tool settune command. Some of these parameters are used to administer GFS quotas:
quota_quantum, quota_enforce, quota_account, and atime_quantum. These parameters are
Section 3.6, "GFS Quota
described in
Parameters that you set with the gfs_tool settune command must be set on each node each time
the file system is mounted. These parameters are not persistent across mounts.
Note
The majority of the tunable parameters are internal parameters. They are intended for
development purposes only and should not be changed.
The gfs_tool gettune command displays a listing of the current values of the GFS tunable
parameters.
Usage
Display Tunable Parameters
gfs_tool gettune MountPoint
MountPoint
Specifies the directory where the GFS file system is mounted.
Examples
In this example, all GFS tunable parameters for the file system on the mount point /mnt/gfs are
displayed.
[root@tng3-1]# gfs_tool gettune /mnt/gfs
ilimit1 = 100
ilimit1_tries = 3
ilimit1_min = 1
ilimit2 = 500
ilimit2_tries = 10
ilimit2_min = 3
demote_secs = 300
incore_log_blocks = 1024
jindex_refresh_secs = 60
depend_secs = 60
scand_secs = 5
recoverd_secs = 60
16
Management", along with examples of how to modify them.