From: Stefan Hajnoczi <stefanha@gmail.com>
To: John Snow <jsnow@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>,
Qemu-block <qemu-block@nongnu.org>,
qemu-devel <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [Qemu-block] [RFC] Differential Backups
Date: Tue, 5 May 2015 11:25:46 +0100 [thread overview]
Message-ID: <20150505102546.GB3149@stefanha-thinkpad.redhat.com> (raw)
In-Reply-To: <5541605C.2090904@redhat.com>
[-- Attachment #1: Type: text/plain, Size: 696 bytes --]
On Wed, Apr 29, 2015 at 06:51:08PM -0400, John Snow wrote:
> This is a feature that should be very easy to add on top of the existing
> incremental feature, since it's just a difference in how the bitmap is
> treated:
>
> Incremental
> - Links to the last incremental (managed by libvirt)
> - Clears the bitmap after creation
>
> Differential:
> - Links to the last full backup always (managed by libvirt)
> - Does not clear the bitmap after creation
>
> No biggie.
Differential backups can be done using incremental backup functionality
in QEMU:
The client application points QEMU to the same target repeatedly instead
of keeping separate incremental backups.
Stefan
[-- Attachment #2: Type: application/pgp-signature, Size: 473 bytes --]
next prev parent reply other threads:[~2015-05-05 10:26 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-29 22:51 [Qemu-devel] [RFC] Differential Backups John Snow
2015-05-05 10:25 ` Stefan Hajnoczi [this message]
2015-05-05 15:55 ` [Qemu-devel] [Qemu-block] " John Snow
2015-05-06 9:17 ` Stefan Hajnoczi
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=20150505102546.GB3149@stefanha-thinkpad.redhat.com \
--to=stefanha@gmail.com \
--cc=armbru@redhat.com \
--cc=jsnow@redhat.com \
--cc=qemu-block@nongnu.org \
--cc=qemu-devel@nongnu.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).