Suspending Activity On A File System; Suspending Activity On A File System - Red Hat ENTERPRISE LINUX 5 - GLOBAL FILE SYSTEM Manual

Chapter 3. Managing GFS
The gfs_tool settune command is used to change the atime_quantum parameter value. It must
be set on each node and each time the file system is mounted. The setting is not persistent across
unmounts.
Usage
Changing the atime_quantum Parameter Value
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.
Example
In this example, the atime update period is set to once a day (86,400 seconds) for the GFS file
system on mount point /gfs.
gfs_tool settune /gfs atime_quantum 86400

3.12. Suspending Activity on a File System

You can suspend write activity to a file system by using the gfs_tool freeze command.
Suspending write activity allows hardware-based device snapshots to be used to capture the file
system in a consistent state. The gfs_tool unfreeze command ends the suspension.
Usage
Start Suspension
gfs_tool freeze MountPoint
End Suspension
gfs_tool unfreeze MountPoint
MountPoint
Specifies the file system.
Examples
This example suspends writes to file system /gfs.
gfs_tool freeze /gfs
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