diff options
Diffstat (limited to 'Documentation/filesystems/gfs2.txt')
| -rw-r--r-- | Documentation/filesystems/gfs2.txt | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/Documentation/filesystems/gfs2.txt b/Documentation/filesystems/gfs2.txt index 593004b6bbab..5e3ab8f3beff 100644 --- a/Documentation/filesystems/gfs2.txt +++ b/Documentation/filesystems/gfs2.txt | |||
| @@ -11,18 +11,15 @@ their I/O so file system consistency is maintained. One of the nifty | |||
| 11 | features of GFS is perfect consistency -- changes made to the file system | 11 | features of GFS is perfect consistency -- changes made to the file system |
| 12 | on one machine show up immediately on all other machines in the cluster. | 12 | on one machine show up immediately on all other machines in the cluster. |
| 13 | 13 | ||
| 14 | GFS uses interchangable inter-node locking mechanisms. Different lock | 14 | GFS uses interchangable inter-node locking mechanisms, the currently |
| 15 | modules can plug into GFS and each file system selects the appropriate | 15 | supported mechanisms are: |
| 16 | lock module at mount time. Lock modules include: | ||
| 17 | 16 | ||
| 18 | lock_nolock -- allows gfs to be used as a local file system | 17 | lock_nolock -- allows gfs to be used as a local file system |
| 19 | 18 | ||
| 20 | lock_dlm -- uses a distributed lock manager (dlm) for inter-node locking | 19 | lock_dlm -- uses a distributed lock manager (dlm) for inter-node locking |
| 21 | The dlm is found at linux/fs/dlm/ | 20 | The dlm is found at linux/fs/dlm/ |
| 22 | 21 | ||
| 23 | In addition to interfacing with an external locking manager, a gfs lock | 22 | Lock_dlm depends on user space cluster management systems found |
| 24 | module is responsible for interacting with external cluster management | ||
| 25 | systems. Lock_dlm depends on user space cluster management systems found | ||
| 26 | at the URL above. | 23 | at the URL above. |
| 27 | 24 | ||
| 28 | To use gfs as a local file system, no external clustering systems are | 25 | To use gfs as a local file system, no external clustering systems are |
| @@ -31,13 +28,19 @@ needed, simply: | |||
| 31 | $ mkfs -t gfs2 -p lock_nolock -j 1 /dev/block_device | 28 | $ mkfs -t gfs2 -p lock_nolock -j 1 /dev/block_device |
| 32 | $ mount -t gfs2 /dev/block_device /dir | 29 | $ mount -t gfs2 /dev/block_device /dir |
| 33 | 30 | ||
| 34 | GFS2 is not on-disk compatible with previous versions of GFS. | 31 | If you are using Fedora, you need to install the gfs2-utils package |
| 32 | and, for lock_dlm, you will also need to install the cman package | ||
| 33 | and write a cluster.conf as per the documentation. | ||
| 34 | |||
| 35 | GFS2 is not on-disk compatible with previous versions of GFS, but it | ||
| 36 | is pretty close. | ||
| 35 | 37 | ||
| 36 | The following man pages can be found at the URL above: | 38 | The following man pages can be found at the URL above: |
| 37 | gfs2_fsck to repair a filesystem | 39 | fsck.gfs2 to repair a filesystem |
| 38 | gfs2_grow to expand a filesystem online | 40 | gfs2_grow to expand a filesystem online |
| 39 | gfs2_jadd to add journals to a filesystem online | 41 | gfs2_jadd to add journals to a filesystem online |
| 40 | gfs2_tool to manipulate, examine and tune a filesystem | 42 | gfs2_tool to manipulate, examine and tune a filesystem |
| 41 | gfs2_quota to examine and change quota values in a filesystem | 43 | gfs2_quota to examine and change quota values in a filesystem |
| 44 | gfs2_convert to convert a gfs filesystem to gfs2 in-place | ||
| 42 | mount.gfs2 to help mount(8) mount a filesystem | 45 | mount.gfs2 to help mount(8) mount a filesystem |
| 43 | mkfs.gfs2 to make a filesystem | 46 | mkfs.gfs2 to make a filesystem |