3.5. Growing a GFS2 File System
gfs2_growcommand is used to expand a GFS2 file system after the device where the file system resides has been expanded. Running the
gfs2_growcommand on an existing GFS2 file system fills all spare space between the current end of the file system and the end of the device with a newly initialized GFS2 file system extension. When the fill operation is completed, the resource index for the file system is updated. All nodes in the cluster can then use the extra storage space that has been added.
gfs2_growcommand must be run on a mounted file system, but only needs to be run on one node in a cluster. All the other nodes sense that the expansion has occurred and automatically start using the new space.
mkfs.gfs2command, you cannot decrease the size of the file system.
- Specifies the GFS2 file system to which the actions apply.
- Back up important data on the file system.
- Determine the volume that is used by the file system to be expanded by running the
- Expand the underlying cluster volume with LVM. For information on administering LVM volumes, see Logical Volume Manager Administration.
gfs2_growcommand, run the
dfcommand to check that the new space is now available in the file system.
/mygfs2fsdirectory is expanded.
gfs2_grow /mygfs2fsFS: Mount Point: /mygfs2fs FS: Device: /dev/mapper/gfs2testvg-gfs2testlv FS: Size: 524288 (0x80000) FS: RG size: 65533 (0xfffd) DEV: Size: 655360 (0xa0000) The file system grew by 512MB. gfs2_grow complete.
- Specifies the directory where the GFS2 file system is mounted.
- Specifies the device node of the file system.
Table 3.3. GFS2-specific Options Available While Expanding A File System
|Help. Displays a short usage message.|
|Quiet. Turns down the verbosity level.|
|Specifies the size of the new resource group. The default size is 256 megabytes.|
|Test. Do all calculations, but do not write any data to the disk and do not expand the file system.|
|Displays command version information.|