btrfs-progs/Documentation/btrfstune.txt

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btrfstune(8)
============
NAME
----
btrfstune - tune various btrfs filesystem parameters
SYNOPSIS
--------
*btrfstune* [options] <dev> [<dev>...]
DESCRIPTION
-----------
*btrfstune* is used to tune various btrfs filesystem parameters,you can
enable/disable some extended features for btrfs.
OPTIONS
-------
-S <value>::
Updates the seeding value.
A positive value will enable seeding, zero will disable seeding, negtive is not allowed.
Enable seeding forces a fs readonly so that you can use it to build other filesystems.
-r::
Enable extended inode refs.
-x::
Enable skinny metadata extent refs.
EXIT STATUS
-----------
*btrfstune* will return 0 if no error happened.
If any problems happened, 1 will be returned.
AUTHOR
------
Written by Shilong Wang and Wenruo Qu.
COPYRIGHT
---------
Copyright (C) 2013 FUJITSU LIMITED.
License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
--------
`mkfs.btrfs`(8)