3.8.2. GFS File Attribute

The gfs_tool command can be used to assign (set) a direct I/O attribute flag, directio, to a GFS file. The directio flag can also be cleared.

You can use the gfs_tool stat filename to check what flags have been set for a GFS file. The output for this command includes a Flags: at the end of the display followed by a listing of the flags that are set for the indicated file.

Usage

Setting the directio Flag

gfs_tool setflag directio File

Clearing the directio Flag

gfs_tool clearflag directio File

File: Specifies the file where the directio flag is assigned.

Example

In this example, the command sets the directio flag on the file named datafile in directory /mnt/gfs.

gfs_tool setflag directio /mnt/gfs/datafile

The following command checks whether the directio flag is set for /mnt/gfs/datafile. The output has been elided to show only the relevant information.

[root@tng3-1 gfs]# gfs_tool stat /mnt/gfs/datafile
  mh_magic = 0x01161970
...

Flags:
  directio