Creating sparse file on XFS and EXT3 has different results

[Ashish Sangwan]

Hole Punch.....
That was nice one Greg!!!
I would rather try fallocate.

On Fri, Aug 5, 2011 at 9:14 PM, Greg Freemyer <greg.freemyer at gmail.com>wrote:

> Apologies for the top post.  I simply forgot to not do that.
>
> On Aug 5, 2011 8:11 AM, "Greg Freemyer" <greg.freemyer at gmail.com> wrote:
> >
> > There are no "specs" as to how a sparse file is handled in response to
> writes.
> >
> > Sparse is mostly beneficial when the holes are very large.
> >
> > If an app really wants to have minimal on disk space, you should
> pre-allocate space with fallocate.
> >
> > You may even need to hole punch after the writes.  Both xfs and ext4
> support both fallocate and hole punching. (I don't know the userspace call
> to hole punch.  I think its a relatively new feature for ext4.)
> >
> > Greg
> >
> > On Aug 4, 2011 10:16 PM, "Ashish Sangwan" <ashishsangwan2 at gmail.com>
> wrote:
>
> Greg
>
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