Hey,
I don't wont to break into your discussion, but I also never heard about
virt-sparsfiy and the sparse option for dd.
I tested it and it works like a charm. I converted a block device 65GB
with dd sparse to 40GB raw image and afterwards I used virsh-sparsify to
reduce the size down to 6.8GB into a qcow2 image file.
Thanks a lot for that hint.
Kai
Am 27.09.2016 um 15:17 schrieb Sven Achtelik:
No, I never came across this approach. I didn’t know about virt-sparsify.
I’ll look into that and give it a try.
Thank you
*Von:*Yaniv Dary [mailto:yd...@redhat.com]
*Gesendet:* Dienstag, 27. September 2016 15:10
*An:* Sven Achtelik <sven.achte...@mailpool.us>
*Cc:* Maton, Brett <mat...@ltresources.co.uk>;
vasily.lamy...@megafon.ru; Ovirt Users <users@ovirt.org>
*Betreff:* Re: [ovirt-users] VM incremental backup
As I see it you have two options:
- In backup use 'dd' with 'conv=sparse' (or similar tool that
allows sparse).
- After backup use virt-sparsify [1] to reduce the size to the real
used size prior to restore.
To make this extra efficient you can use virt-sparsify anyways after
backup to make the file even smaller.
Have you considered this approach?
[1] http://libguestfs.org/virt-sparsify.1.html
Yaniv Dary
Technical Product Manager
Red Hat Israel Ltd.
34 Jerusalem Road
Building A, 4th floor
Ra'anana, Israel 4350109
Tel : +972 (9) 7692306
8272306
Email: yd...@redhat.com <mailto:yd...@redhat.com>
IRC : ydary
On Tue, Sep 27, 2016 at 4:01 PM, Sven Achtelik
<sven.achte...@mailpool.us <mailto:sven.achte...@mailpool.us>> wrote:
Hi Yaniv,
how can this be done with DD ? Since it doesn’t know if the block
is free space ? I’ve been looking for such a solution for a long
time now. Everything I could find out was that I have to use a
utility that understands the FS and therefore knows where the free
space is.
Thank you,
Sven
*Von:*users-boun...@ovirt.org <mailto:users-boun...@ovirt.org>
[mailto:users-boun...@ovirt.org <mailto:users-boun...@ovirt.org>]
*Im Auftrag von *Yaniv Dary
*Gesendet:* Dienstag, 27. September 2016 14:38
*An:* Maton, Brett <mat...@ltresources.co.uk
<mailto:mat...@ltresources.co.uk>>
*Cc:* vasily.lamy...@megafon.ru
<mailto:vasily.lamy...@megafon.ru>; Ovirt Users <users@ovirt.org
<mailto:users@ovirt.org>>
*Betreff:* Re: [ovirt-users] VM incremental backup
Full VM disk backup. If you use dd you can drop the 0 parts of the
disk.
Yaniv Dary
Technical Product Manager
Red Hat Israel Ltd.
34 Jerusalem Road
Building A, 4th floor
Ra'anana, Israel 4350109
Tel : +972 (9) 7692306 <tel:%2B972%20%289%29%207692306>
8272306
Email: yd...@redhat.com <mailto:yd...@redhat.com>
IRC : ydary
2016-09-27 15:27 GMT+03:00 Maton, Brett <mat...@ltresources.co.uk
<mailto:mat...@ltresources.co.uk>>:
Is there a preferred or recommended backup method in the
meantime ?
2016-09-22 10:30 GMT+01:00 vasily.lamy...@megafon.ru
<mailto:vasily.lamy...@megafon.ru> <vasily.lamy...@megafon.ru
<mailto:vasily.lamy...@megafon.ru>>:
Hello!
I would like to understand the existence of the
possibility of incremental VM backups.
And if it is, the means by which it is achieved.
While I was only able to achieve a complete backup of the
virtual machine (but it is a very large amount of
information and time) by cloning a snapshot of the VM and
export to data domain.
*Ламыкин Василий*
Старший инженер по эксплуатации сервисных платформ
Столичный ф-ал ПАО "МегаФон
+7 (926) 500-3308 <tel:%2B7%20%28926%29%20500-3308>
МегаФон лого+знак РУС B2C
------------------------------------------------------------------------
Информация в этом сообщении предназначена исключительно
для конкретных лиц, которым она адресована. В сообщении
может содержаться конфиденциальная информация, которая не
может быть раскрыта или использована кем-либо, кроме
адресатов. Если вы не адресат этого сообщения, то
использование, переадресация, копирование или
распространение содержания сообщения или его части
незаконно и запрещено. Если Вы получили это сообщение
ошибочно, пожалуйста, незамедлительно сообщите отправителю
об этом и удалите со всем содержимым само сообщение и
любые возможные его копии и приложения.
The information contained in this communication is
intended solely for the use of the individual or entity to
whom it is addressed and others authorized to receive it.
It may contain confidential or legally privileged
information. The contents may not be disclosed or used by
anyone other than the addressee. If you are not the
intended recipient(s), any use, disclosure, copying,
distribution or any action taken or omitted to be taken in
reliance on it is prohibited and may be unlawful. If you
have received this communication in error please notify us
immediately by responding to this email and then delete
the e-mail and all attachments and any copies thereof.
(c)20mf50
_______________________________________________
Users mailing list
Users@ovirt.org <mailto:Users@ovirt.org>
http://lists.ovirt.org/mailman/listinfo/users
_______________________________________________
Users mailing list
Users@ovirt.org <mailto:Users@ovirt.org>
http://lists.ovirt.org/mailman/listinfo/users
_______________________________________________
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
it-novum GmbH
i. A. Kai Wagner - Team Lead Support & Presales openATTIC
_____________________________________________________________
Tel: +49 661 103-762
Fax: +49 661 10317762
Mail: kai.wag...@it-novum.com
it-novum GmbH • Edelzeller Straße 44 • 36043 Fulda • http://www.it-novum.com/
Handelsregister Amtsgericht Fulda, HRB 1934 • Geschäftsführer: Michael Kienle • Sitz der Gesellschaft: Fulda
Der Inhalt dieser E-Mail ist vertraulich. Wenn Sie nicht der eigentliche Empfänger sein sollten, informieren Sie bitte sofort den Absender oder vernichten umgehend diese Mail. Jegliche unerlaubte Vervielfältigung oder Weiterleitung dieser Mail ist strengstens verboten.
This e-mail may contain confidential and/or priviledged information. If you are not the intended recepient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorised copying, disclosure or distribution of material in this e-mail is strictly forbidden.
_______________________________________________
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
