* [question] "copy-on-write" in ext4
@ 2008-09-27 23:08 Ivan Zorin
2008-09-28 2:17 ` Theodore Tso
0 siblings, 1 reply; 2+ messages in thread
From: Ivan Zorin @ 2008-09-27 23:08 UTC (permalink / raw)
To: linux-kernel
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?
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [question] "copy-on-write" in ext4
2008-09-27 23:08 [question] "copy-on-write" in ext4 Ivan Zorin
@ 2008-09-28 2:17 ` Theodore Tso
0 siblings, 0 replies; 2+ messages in thread
From: Theodore Tso @ 2008-09-28 2:17 UTC (permalink / raw)
To: Ivan Zorin; +Cc: linux-kernel
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
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2008-09-28 2:17 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2008-09-27 23:08 [question] "copy-on-write" in ext4 Ivan Zorin
2008-09-28 2:17 ` Theodore Tso
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.