gfs_tool(8)gfs_tool(8)NAMEgfs_tool - interface to gfs ioctl calls
SYNOPSISgfs_tool COMMAND [OPTION]...
DESCRIPTIONgfs_tool is an interface to a variety of the GFS ioctl calls.
COMMANDS
clearflag Flag File1 File2 ...
Clear an attribute flag on a file.
counters MountPoint [-c]
Print out statistics about a filesystem. If -c is used,
gfs_tool continues to run printing out the stats once a second.
df MountPoint
Print out a space usage summary of a given filesystem. The
information printed is more detailed than a standard "df".
freeze MountPoint
Freeze (quiesce) a GFS cluster.
getsb MountPoint
Print out the superblock of a mounted filesystem.
gettune MountPoint
Print out the current values of the tuning parameters in a run‐
ning filesystem.
jindex MountPoint
Print out the journal index of a mounted filesystem.
layout File [buffersize]
Print out on-disk layout information about a file or directory.
Buffersize is the size of the buffer (in bytes) that gfs_tool
allocates to store the file's metadata during processing. It
defaults to 4194304 bytes. If you are printing a very big
directory you may need to specify a bigger size.
list List the currently mounted GFS filesystems. Each line repre‐
sents a filesystem. The columns represent (in order): 1) A num‐
ber that is a cookie that represents the mounted filesystem. 2)
The name of the device that holds the filesystem (well, the name
as the Linux kernel knows it). 3) The lock table field that the
filesystem was mounted with.
lockdump MountPoint [buffersize]
Print out information about the locks this machine holds for a
given filesystem. Buffersize is the size of the buffer (in
bytes) that gfs_tool allocates to store the lock data during
processing. It defaults to 4194304 bytes.
margs arguments
This loads arguments into the module what will override the
mount options passed with the -o field on the next mount. See
gfs_mount(8).
reclaim File
Returns unused on-disk metadata blocks to free blocks.
rindex MountPoint
Print out the resource group index of a mounted filesystem.
quota MountPoint
Print out the quota file of a mounted filesystem. Also see the
"gfs_quota list" command.
sb device proto [newvalue]
View (and possibly replace) the name of the locking protocol in
the file system superblock. The file system shouldn't be
mounted by any client when you do this.
sb device table [newvalue]
View (and possibly replace) the name of the locking table in the
file system superblock. The file system shouldn't be mounted by
any client when you do this.
sb device ondisk [newvalue]
View (and possibly replace) the ondisk format number in the file
system superblock. The file system shouldn't be mounted by any
client when you do this. No one should have to use this.
sb device multihost [newvalue]
View (and possibly replace) the multihost format number in the
file system superblock. The file system shouldn't be mounted by
any client when you do this. No one should have to use this.
sb device all
Print out the superblock.
setflag Flag File1 File2 ...
Set an attribute flag on a file. There are four currently sup‐
ported flags. They are jdata, directio, inherit_jdata, and
inherit_directio.
The jdata flag causes all the data written to a regular file to
be journaled. The jdata flag can only be set (or cleared) if the
file is zero length.
The directio flag causes all I/O to a regular file to be Direct
I/O, even if the O_DIRECT flag isn't used on the open() command.
The inherit_jdata flag is set on a directory. It causes all new
regular files created in that directory automatically inherit
the jdata flag. The inherit_jdata is also inherited by any new
subdirectories created in that directory.
The inherit_directio flag is set on a directory. It causes all
new regular files created in that directory automatically
inherit the directio flag. The inherit_directio is also inher‐
ited by any new subdirectories created in that directory.
settune MountPoint parameter newvalue
Set the value of tuning parameter. Use gettune for a listing of
tunable parameters.
shrink MountPoint
Causes any unused inodes to be thrown out of memory.
stat File
Print out extended stat information about a file.
unfreeze MountPoint
Unfreeze a GFS cluster.
version
Print out the version of GFS that this program goes with.
withdraw MountPoint
Cause GFS to abnormally shutdown a given filesystem on this
node.
gfs_tool(8)
