From: Theodore Tso <tytso@mit.edu>
To: Ivan Zorin <ivan.a.zorin@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [question] "copy-on-write" in ext4
Date: Sat, 27 Sep 2008 22:17:46 -0400 [thread overview]
Message-ID: <20080928021746.GB5025@mit.edu> (raw)
In-Reply-To: <48DEBCE9.3000002@gmail.com>
On Sun, Sep 28, 2008 at 03:08:25AM +0400, Ivan Zorin wrote:
> Hello, everybody. I have a question to ext4 filesystem developers. Could
> you tell me please, have you planned to implement (no matter, how soon)
> in ext4 some "copy-on-write" feature? If you have, then how it will be
> looks like (and how soon :-) ?
> If you haven't, then did you think about ability to implement such
> feature and how it could be?
What do you mean by "copy on write", precisely? Do you mean at the
file level, directory level, or the filesystem level?
We don't have any plans to implement "copy on write" in ext4, although
you can create a copy-on-write snapshot at the block device level
using LVM/devicemapper. For many things (database backups, etc.) this
is quite suitable.
So why don't you tell us what you are trying to do, and we can suggest
to you ways that you might be able to do it.
- Ted
prev parent reply other threads:[~2008-09-28 2:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-27 23:08 [question] "copy-on-write" in ext4 Ivan Zorin
2008-09-28 2:17 ` Theodore Tso [this message]
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=20080928021746.GB5025@mit.edu \
--to=tytso@mit.edu \
--cc=ivan.a.zorin@gmail.com \
--cc=linux-kernel@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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.