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<p>Hi all,</p>
<p>I didn't know this tool, after testing the original 40GB image
size is reduced as expected to 2,9GB with du -sh, but transfer
between servers continue to act as a 40GB image. <br>
</p>
<p>So if I understand virt-sparsify reduces the effective space on
the local disk, but the disk is seen with its original size by
other systems, and there is no advantage in transferring the image
from one server to an other.</p>
<p>Please tell me if I'm wrong.<br>
</p>
<div class="moz-cite-prefix">Le 29/09/2016 à 15:10, Kai Wagner a
écrit :<br>
</div>
<blockquote
cite="mid:MP2007FB9D002AAC0543b85f-1837-5ad7-4f0f-86b0028235fa@it-novum.com"
type="cite">
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
<p>Hey,</p>
<p>I don't wont to break into your discussion, but I also never
heard about virt-sparsfiy and the sparse option for dd.</p>
<p>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. <br>
</p>
<p>Thanks a lot for that hint.</p>
<p>Kai<br>
</p>
<div class="moz-cite-prefix">Am 27.09.2016 um 15:17 schrieb Sven
Achtelik:<br>
</div>
<blockquote
cite="mid:BFAB40933B3367488CE6299BAF8592D1012BC9821EB6@SOCRATES.asl.local"
type="cite">
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"
lang="EN-US">No, I never came across this approach. I
didn’t know about virt-sparsify. <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"
lang="EN-US">I’ll look into that and give it a try. <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"
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<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">Von:</span></b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">
Yaniv Dary [<a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="mailto:ydary@redhat.com">mailto:ydary@redhat.com</a>]
<br>
<b>Gesendet:</b> Dienstag, 27. September 2016 15:10<br>
<b>An:</b> Sven Achtelik <a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="mailto:Sven.Achtelik@mailpool.us"><Sven.Achtelik@mailpool.us></a><br>
<b>Cc:</b> Maton, Brett <a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="mailto:matonb@ltresources.co.uk"><matonb@ltresources.co.uk></a>;
<a moz-do-not-send="true" class="moz-txt-link-abbreviated"
href="mailto:vasily.lamykin@MegaFon.ru">vasily.lamykin@MegaFon.ru</a>;
Ovirt Users <a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="mailto:users@ovirt.org"><users@ovirt.org></a><br>
<b>Betreff:</b> Re: [ovirt-users] VM incremental backup<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal"><span
style="font-size:9.5pt;font-family:"Courier
New"">As I see it you have two options:<br>
- In backup use '<span class="gmail-il">dd</span>'
with 'conv=sparse' (or similar tool that
allows sparse).<o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span
style="font-size:9.5pt;font-family:"Courier
New"">- After backup use virt-sparsify [1] to
reduce the size to the real used size prior to
restore.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:9.5pt;font-family:"Courier
New""><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span
style="font-size:9.5pt;font-family:"Courier
New"">To make this extra efficient you can
use virt-sparsify anyways after backup to make the
file even smaller.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:9.5pt;font-family:"Courier
New"">Have you considered this approach?<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:9.5pt;font-family:"Courier
New""><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:9.5pt;font-family:"Courier
New"">[1] <a moz-do-not-send="true"
href="http://libguestfs.org/virt-sparsify.1.html"
target="_blank">http://libguestfs.org/virt-sparsify.1.html</a><o:p></o:p></span></p>
</div>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:9.5pt;font-family:"Courier
New""><o:p> </o:p></span></p>
</div>
</div>
</div>
<div>
<p class="MsoNormal"><br clear="all">
<o:p></o:p></p>
<div>
<div>
<div>
<div>
<div>
<pre><span style="font-family:"Arial",sans-serif">Yaniv Dary<o:p></o:p></span></pre>
<pre><span style="font-family:"Arial",sans-serif">Technical Product Manager<o:p></o:p></span></pre>
<pre><span style="font-family:"Arial",sans-serif">Red Hat Israel Ltd.<o:p></o:p></span></pre>
<pre><span style="font-family:"Arial",sans-serif">34 Jerusalem Road<o:p></o:p></span></pre>
<pre><span style="font-family:"Arial",sans-serif">Building A, 4th floor<o:p></o:p></span></pre>
<pre><span style="font-family:"Arial",sans-serif">Ra'anana, Israel 4350109<o:p></o:p></span></pre>
<pre><span style="font-family:"Arial",sans-serif"><o:p> </o:p></span></pre>
<pre><span style="font-family:"Arial",sans-serif">Tel : +972 (9) 7692306<o:p></o:p></span></pre>
<pre><span style="font-family:"Arial",sans-serif"> 8272306<o:p></o:p></span></pre>
<pre><span style="font-family:"Arial",sans-serif">Email: <a moz-do-not-send="true" href="mailto:ydary@redhat.com" target="_blank">ydary@redhat.com</a><o:p></o:p></span></pre>
<pre><span style="font-family:"Arial",sans-serif">IRC : ydary</span><o:p></o:p></pre>
</div>
</div>
</div>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On Tue, Sep 27, 2016 at 4:01 PM, Sven
Achtelik <<a moz-do-not-send="true"
href="mailto:Sven.Achtelik@mailpool.us"
target="_blank">Sven.Achtelik@mailpool.us</a>>
wrote:<o:p></o:p></p>
<blockquote style="border:none;border-left:solid #CCCCCC
1.0pt;padding:0cm 0cm 0cm
6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hi
Yaniv, </span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"
lang="EN-US">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. </span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"
lang="EN-US">Thank you, </span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"
lang="EN-US">Sven</span><a
moz-do-not-send="true"
name="m_-6373295545161251140__MailEndCompose"></a><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">Von:</span></b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <a
moz-do-not-send="true"
href="mailto:users-bounces@ovirt.org"
target="_blank">users-bounces@ovirt.org</a>
[mailto:<a moz-do-not-send="true"
href="mailto:users-bounces@ovirt.org"
target="_blank">users-bounces@ovirt.org</a>] <b>Im
Auftrag von </b>Yaniv Dary<br>
<b>Gesendet:</b> Dienstag, 27. </span><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"
lang="EN-US">September 2016 14:38<br>
<b>An:</b> Maton, Brett <</span><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"><a
moz-do-not-send="true"
href="mailto:matonb@ltresources.co.uk"
target="_blank"><span lang="EN-US">matonb@ltresources.co.uk</span></a></span><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"
lang="EN-US">><br>
<b>Cc:</b> </span><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"><a
moz-do-not-send="true"
href="mailto:vasily.lamykin@MegaFon.ru"><span
lang="EN-US">vasily.lamykin@MegaFon.ru</span></a></span><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"
lang="EN-US">; Ovirt Users <</span><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"><a
moz-do-not-send="true"
href="mailto:users@ovirt.org" target="_blank"><span
lang="EN-US">users@ovirt.org</span></a></span><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"
lang="EN-US">><br>
<b>Betreff:</b> Re: [ovirt-users] VM incremental
backup</span><span lang="EN-US"><o:p></o:p></span></p>
<div>
<div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
lang="EN-US"> <o:p></o:p></span></p>
<div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Full
VM disk backup. If you use dd you can drop
the 0 parts of the disk. <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><br
clear="all">
<o:p></o:p></p>
<div>
<div>
<div>
<div>
<div>
<pre><span style="font-family:"Arial",sans-serif">Yaniv Dary</span><o:p></o:p></pre>
<pre><span style="font-family:"Arial",sans-serif">Technical Product Manager</span><o:p></o:p></pre>
<pre><span style="font-family:"Arial",sans-serif">Red Hat Israel Ltd.</span><o:p></o:p></pre>
<pre><span style="font-family:"Arial",sans-serif">34 Jerusalem Road</span><o:p></o:p></pre>
<pre><span style="font-family:"Arial",sans-serif">Building A, 4th floor</span><o:p></o:p></pre>
<pre><span style="font-family:"Arial",sans-serif">Ra'anana, Israel 4350109</span><o:p></o:p></pre>
<pre><span style="font-family:"Arial",sans-serif"> </span><o:p></o:p></pre>
<pre><span style="font-family:"Arial",sans-serif">Tel : <a moz-do-not-send="true" href="tel:%2B972%20%289%29%207692306" target="_blank">+972 (9) 7692306</a></span><o:p></o:p></pre>
<pre><span style="font-family:"Arial",sans-serif"> 8272306</span><o:p></o:p></pre>
<pre><span style="font-family:"Arial",sans-serif">Email: <a moz-do-not-send="true" href="mailto:ydary@redhat.com" target="_blank">ydary@redhat.com</a></span><o:p></o:p></pre>
<pre><span style="font-family:"Arial",sans-serif">IRC : ydary</span><o:p></o:p></pre>
</div>
</div>
</div>
</div>
</div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">2016-09-27
15:27 GMT+03:00 Maton, Brett <<a
moz-do-not-send="true"
href="mailto:matonb@ltresources.co.uk"
target="_blank">matonb@ltresources.co.uk</a>>:<o:p></o:p></p>
<blockquote
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<div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Is
there a preferred or recommended
backup method in the meantime ?<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<div>
<div>
<div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">2016-09-22
10:30 GMT+01:00 <a
moz-do-not-send="true"
href="mailto:vasily.lamykin@MegaFon.ru"
target="_blank">vasily.lamykin@MegaFon.ru</a>
<<a moz-do-not-send="true"
href="mailto:vasily.lamykin@megafon.ru"
target="_blank">vasily.lamykin@megafon.ru</a>>:<o:p></o:p></p>
</div>
</div>
<blockquote
style="border:none;border-left:solid
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6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
lang="EN-US">Hello!</span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
lang="EN-US">I would
like to understand the
existence of the
possibility of
incremental VM backups.</span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
lang="EN-US">And if it
is, the means by which
it is achieved.</span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
lang="EN-US">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.</span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
style="color:#1F497D"
lang="RU">Ламыкин
Василий</span></b><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="color:#1F4E79;background:white" lang="RU">Старший инженер по
эксплуатации сервисных
платформ</span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="color:#1F4E79;background:white" lang="RU">Столичный ф-ал ПАО
"МегаФон</span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="color:#1F4E79;background:white" lang="RU"> </span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="color:#1F497D"
lang="RU"><a
moz-do-not-send="true"
href="tel:%2B7%20%28926%29%20500-3308" target="_blank">+7 (926) 500-3308</a></span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
lang="RU"><img
id="_x0000_i1025"
src="cid:part45.31C0F1D9.302C1733@abes.fr"
alt="МегаФон лого+знак
РУС B2C" height="54"
width="285" border="0"></span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
lang="RU"> </span><o:p></o:p></p>
</div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
lang="RU"> </span><o:p></o:p></p>
<div class="MsoNormal"
style="text-align:center"
align="center"><span
lang="RU">
<hr size="4" width="100%"
align="center"></span></div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:7.5pt;font-family:"Arial",sans-serif;color:gray"
lang="RU"><br>
Информация в этом
сообщении предназначена
исключительно для
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она адресована. В
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It may contain
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<br>
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</div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;margin-bottom:12.0pt">_______________________________________________<br>
Users mailing list<br>
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target="_blank">Users@ovirt.org</a><br>
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target="_blank">http://lists.ovirt.org/mailman/listinfo/users</a><o:p></o:p></p>
</blockquote>
</div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
</div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><br>
_______________________________________________<br>
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</blockquote>
</div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
<br>
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<br>
<pre wrap="">_______________________________________________
Users mailing list
<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:Users@ovirt.org">Users@ovirt.org</a>
<a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://lists.ovirt.org/mailman/listinfo/users">http://lists.ovirt.org/mailman/listinfo/users</a>
</pre>
</blockquote>
<br>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Users@ovirt.org">Users@ovirt.org</a>
<a class="moz-txt-link-freetext" href="http://lists.ovirt.org/mailman/listinfo/users">http://lists.ovirt.org/mailman/listinfo/users</a>
</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Nathanaël Blanchet
Supervision réseau
Pôle Infrastrutures Informatiques
227 avenue Professeur-Jean-Louis-Viala
34193 MONTPELLIER CEDEX 5
Tél. 33 (0)4 67 54 84 55
Fax 33 (0)4 67 54 84 14
<a class="moz-txt-link-abbreviated" href="mailto:blanchet@abes.fr">blanchet@abes.fr</a> </pre>
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