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author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-12-20 19:04:49 +0100 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-12-20 19:04:49 +0100 |
commit | 7703f46f2cafa57b9e5e8f4d6ff3dd8dcf0c1656 (patch) | |
tree | 7ecd8e128a3eeabdf7a18bd04280c130a0335a50 /Documentation/filesystems | |
parent | epoll: fix compat syscall wire up of epoll_pwait2 (diff) | |
parent | gfs2: in signal_our_withdraw wait for unfreeze of _this_ fs only (diff) | |
download | linux-7703f46f2cafa57b9e5e8f4d6ff3dd8dcf0c1656.tar.xz linux-7703f46f2cafa57b9e5e8f4d6ff3dd8dcf0c1656.zip |
Merge tag 'gfs2-for-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2
Pull gfs2 updates from Andreas Gruenbacher:
- Don't wait for unfreeze of the wrong filesystems
- Remove an obsolete delete_work_func hack and an incorrect
sb_start_write
- Minor documentation updates and cosmetic care
* tag 'gfs2-for-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
gfs2: in signal_our_withdraw wait for unfreeze of _this_ fs only
gfs2: Remove sb_start_write from gfs2_statfs_sync
gfs2: remove trailing semicolons from macro definitions
Revert "GFS2: Prevent delete work from occurring on glocks used for create"
gfs2: Make inode operations static
MAINTAINERS: Add gfs2 bug tracker link
Documentation: Update filesystems/gfs2.rst
Diffstat (limited to 'Documentation/filesystems')
-rw-r--r-- | Documentation/filesystems/gfs2.rst | 37 |
1 files changed, 18 insertions, 19 deletions
diff --git a/Documentation/filesystems/gfs2.rst b/Documentation/filesystems/gfs2.rst index 8d1ab589ce18..1bc48a13430c 100644 --- a/Documentation/filesystems/gfs2.rst +++ b/Documentation/filesystems/gfs2.rst @@ -1,53 +1,52 @@ .. SPDX-License-Identifier: GPL-2.0 -================== -Global File System -================== +==================== +Global File System 2 +==================== -https://fedorahosted.org/cluster/wiki/HomePage - -GFS is a cluster file system. It allows a cluster of computers to +GFS2 is a cluster file system. It allows a cluster of computers to simultaneously use a block device that is shared between them (with FC, -iSCSI, NBD, etc). GFS reads and writes to the block device like a local +iSCSI, NBD, etc). GFS2 reads and writes to the block device like a local file system, but also uses a lock module to allow the computers coordinate their I/O so file system consistency is maintained. One of the nifty -features of GFS is perfect consistency -- changes made to the file system +features of GFS2 is perfect consistency -- changes made to the file system on one machine show up immediately on all other machines in the cluster. -GFS uses interchangeable inter-node locking mechanisms, the currently +GFS2 uses interchangeable inter-node locking mechanisms, the currently supported mechanisms are: lock_nolock - - allows gfs to be used as a local file system + - allows GFS2 to be used as a local file system lock_dlm - - uses a distributed lock manager (dlm) for inter-node locking. + - uses the distributed lock manager (dlm) for inter-node locking. The dlm is found at linux/fs/dlm/ -Lock_dlm depends on user space cluster management systems found +lock_dlm depends on user space cluster management systems found at the URL above. -To use gfs as a local file system, no external clustering systems are +To use GFS2 as a local file system, no external clustering systems are needed, simply:: $ mkfs -t gfs2 -p lock_nolock -j 1 /dev/block_device $ mount -t gfs2 /dev/block_device /dir -If you are using Fedora, you need to install the gfs2-utils package -and, for lock_dlm, you will also need to install the cman package -and write a cluster.conf as per the documentation. For F17 and above -cman has been replaced by the dlm package. +The gfs2-utils package is required on all cluster nodes and, for lock_dlm, you +will also need the dlm and corosync user space utilities configured as per the +documentation. + +gfs2-utils can be found at https://pagure.io/gfs2-utils GFS2 is not on-disk compatible with previous versions of GFS, but it is pretty close. -The following man pages can be found at the URL above: +The following man pages are available from gfs2-utils: ============ ============================================= fsck.gfs2 to repair a filesystem gfs2_grow to expand a filesystem online gfs2_jadd to add journals to a filesystem online tunegfs2 to manipulate, examine and tune a filesystem - gfs2_convert to convert a gfs filesystem to gfs2 in-place + gfs2_convert to convert a gfs filesystem to GFS2 in-place mkfs.gfs2 to make a filesystem ============ ============================================= |