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
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