From: Li Zefan <lizf@cn.fujitsu.com>
To: Hadmut Danisch <hadmut@danisch.de>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: Setting options permanently?
Date: Mon, 30 Jan 2012 15:49:27 +0800 [thread overview]
Message-ID: <4F264B87.3090400@cn.fujitsu.com> (raw)
In-Reply-To: <4F22BCCC.5090800@danisch.de>
> Is there a way to set options like compression on a btrfs permanently to
> activate them even when mounted automatically by the desktop or manually
> by a third person?
Actually there is.
Btrfs supports per file compression flag, and if this flag is set to a
directory, all files in that directory will inherit the flag.
So you can mount the filesystem for the first time and set the flag for
the root dir, and that's it. There's a flaw that the compression method
is zlib, which should be changed to lzo (or lz4, or snappy..) in the
future.
chattr is used to set file flags, and there was a patchset to enable
compression flag for chattr, but was never merged:
http://www.spinics.net/lists/linux-btrfs/msg09604.html
http://www.spinics.net/lists/linux-btrfs/msg09605.html
prev parent reply other threads:[~2012-01-30 7:49 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-27 15:03 Setting options permanently? Hadmut Danisch
2012-01-27 23:20 ` Chester
2012-01-28 0:49 ` Hadmut Danisch
2012-01-28 3:32 ` Duncan
2012-01-28 6:05 ` Ben Klein
2012-01-28 8:23 ` Roman Mamedov
2012-01-28 9:24 ` Ben Klein
2012-01-28 10:55 ` Duncan
2012-01-30 5:57 ` Li Zefan
2012-01-28 12:07 ` Fajar A. Nugraha
2012-01-30 7:18 ` Sander
2012-01-30 7:49 ` Li Zefan [this message]
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