From: Zheng Liu <gnehzuil.liu@gmail.com>
To: "Bradley C. Kuszmaul" <kuszmaul@gmail.com>
Cc: linux-ext4 <linux-ext4@vger.kernel.org>
Subject: Re: hole punching in ext4
Date: Wed, 23 Jan 2013 00:20:09 +0800 [thread overview]
Message-ID: <20130122162009.GB2072@gmail.com> (raw)
In-Reply-To: <CAKSyJXdbwtOQi==rPZ3nS72bLb9wd0rrmt8RTNPJMUCph-B1Ow@mail.gmail.com>
On Tue, Jan 22, 2013 at 09:34:59AM -0500, Bradley C. Kuszmaul wrote:
> Hi,
>
> Do any of the ext file systems support hole punching? If so, do the
> redhat distributions support it? Can someone provide an example of a
> program that punches a hole in a file in an ext4 file system?
Hello,
Ext4 file system supports hole punching. But until now only extent-based
file supports it. As far as I know, redhat distributions don't support
hole punching. You can find a sample program from e2fsprogs which is in
$e2fsprogs/conrib/fallocate.c. The latest fallocate(1) in util-linux
also can be as a demo.
Regards,
- Zheng
next prev parent reply other threads:[~2013-01-22 16:06 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAKSyJXfvTFjGMO2ZZPsnSjc_fnUzfs2oMrYf7UQoPvO0=98FxA@mail.gmail.com>
2013-01-22 14:34 ` hole punching in ext4 Bradley C. Kuszmaul
2013-01-22 15:30 ` Eric Sandeen
2013-01-22 16:20 ` Zheng Liu [this message]
2013-01-22 23:50 ` Bradley C. Kuszmaul
2013-01-23 0:03 ` Andreas Dilger
2013-01-23 1:38 ` Eric Sandeen
2013-01-22 16:38 ` Carlos Maiolino
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