1 .. SPDX-License-Identifier: GPL-2.0
2
3 ====================
4 Global File System 2
5 ====================
6
7 GFS2 is a cluster file system. It allows a clu
8 simultaneously use a block device that is shar
9 iSCSI, NBD, etc). GFS2 reads and writes to th
10 file system, but also uses a lock module to al
11 their I/O so file system consistency is mainta
12 features of GFS2 is perfect consistency -- cha
13 on one machine show up immediately on all othe
14
15 GFS2 uses interchangeable inter-node locking m
16 supported mechanisms are:
17
18 lock_nolock
19 - allows GFS2 to be used as a local file s
20
21 lock_dlm
22 - uses the distributed lock manager (dlm)
23 The dlm is found at linux/fs/dlm/
24
25 lock_dlm depends on user space cluster managem
26 at the URL above.
27
28 To use GFS2 as a local file system, no externa
29 needed, simply::
30
31 $ mkfs -t gfs2 -p lock_nolock -j 1 /dev/bloc
32 $ mount -t gfs2 /dev/block_device /dir
33
34 The gfs2-utils package is required on all clus
35 will also need the dlm and corosync user space
36 documentation.
37
38 gfs2-utils can be found at https://pagure.io/g
39
40 GFS2 is not on-disk compatible with previous v
41 is pretty close.
42
43 The following man pages are available from gfs
44
45 ============ ======================
46 fsck.gfs2 to repair a filesystem
47 gfs2_grow to expand a filesystem
48 gfs2_jadd to add journals to a f
49 tunegfs2 to manipulate, examine
50 gfs2_convert to convert a gfs files
51 mkfs.gfs2 to make a filesystem
52 ============ ======================
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