Suspending Activity On A File System; Usage - Red Hat GFS 6.0 Administrator's Manual

Chapter 9. Managing GFS
By using the
gettune
ing
atime_quantum
The
gfs_tool settune
be set on each node and each time the file system is mounted. (The setting is not persistent across
unmounts.)

9.9.2.1. Usage

Displaying Tunable Parameters
gfs_tool gettune MountPoint
MountPoint
Specifies the directory where the GFS file system is mounted.
Changing the
atime_quantum
gfs_tool settune MountPoint atime_quantum Seconds
MountPoint
Specifies the directory where the GFS file system is mounted.
Seconds
Specifies the update period in seconds.
9.9.2.2. Examples
In this example, all GFS tunable parameters for the file system on the mount point
played.
gfs_tool gettune /gfs1
In this example, the
atime
on mount point
/gfs1
gfs_tool settune /gfs1 atime_quantum 86400

9.10. Suspending Activity on a File System

All write activity to a file system can be suspended for a time by using the
action. The
freeze
hardware-based device snapshots to be used to capture the file system in a consistent state.
action flag of the
gfs_tool
(default is 3600 seconds) are displayed.
command is used to change the
Parameter Value
update period is set to once a day (86,400 seconds) for the GFS file system
.
action returns the file system to its ordinary state. That feature allows
unfreeze
command, all current tunable parameters includ-
atime_quantum
107
parameter value. It must
are dis-
/gfs1
command's
gfs_tool