From: Douglas Gilbert <dgilbert@interlog.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: linux-scsi <linux-scsi@vger.kernel.org>
Subject: Re: [LSF/MM TOPIC] Sparseness in storage
Date: Thu, 03 Feb 2011 09:40:25 -0500 [thread overview]
Message-ID: <4D4ABE59.5010409@interlog.com> (raw)
In-Reply-To: <20110203022312.GA8529@infradead.org>
On 11-02-02 09:23 PM, Christoph Hellwig wrote:
> On Wed, Feb 02, 2011 at 12:07:23PM -0500, Douglas Gilbert wrote:
>> are improving their sparseness handling as well, with Linux
>> playing "catch up" to NTFS in this regard (e.g. the new
>> FALLOC_FL_PUNCH_HOLE flag in fallocate() ).
>
> FYI: XFS has supported hole punching for more than 15 years, although
> the first years obviously were't on Linux.
I was looking at the Windows API yesterday and you need
to check each volume for sparse support. So it is file
system dependent there as well: VFAT doesn't support
sparseness and NTFS (version ?) does.
From the perspective of user space tools, POSIX support
for sparseness would be helpful and FALLOC_FL_PUNCH_HOLE
looks like a step in that direction.
Doug Gilbert
next prev parent reply other threads:[~2011-02-03 14:40 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-02 17:07 [LSF/MM TOPIC] Sparseness in storage Douglas Gilbert
2011-02-03 2:23 ` Christoph Hellwig
2011-02-03 14:40 ` Douglas Gilbert [this message]
2011-02-06 22:18 ` Shyam_Iyer
2011-02-06 23:58 ` Richard Sharpe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4D4ABE59.5010409@interlog.com \
--to=dgilbert@interlog.com \
--cc=hch@infradead.org \
--cc=linux-scsi@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).