<div dir="ltr"><br><br><div class="gmail_quote"><div dir="ltr">On Thu, Mar 9, 2017 at 12:40 PM Nathanaël Blanchet <<a href="mailto:blanchet@abes.fr">blanchet@abes.fr</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor="#FFFFFF" text="#000000" class="gmail_msg">
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<div class="m_322729499030084489moz-cite-prefix gmail_msg">Le 09/03/2017 à 10:25, Gianluca Cecchi
a écrit :<br class="gmail_msg">
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<div class="gmail_quote gmail_msg">On Wed, Mar 8, 2017 at 6:05 PM,
Gianluca Cecchi <span dir="ltr" class="gmail_msg"><<a href="mailto:gianluca.cecchi@gmail.com" class="gmail_msg" target="_blank">gianluca.cecchi@gmail.com</a>></span>
wrote:<br class="gmail_msg">
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<div class="gmail_msg">NOTE: during the snapshot creation I see in web
admin console the VM in paused state and also not
responsive in both console and ssh session.</div>
<div class="gmail_msg">After a couple of seconds it comes back and as
a confirmation I see this in its messages:</div>
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<div class="gmail_msg">Mar 8 17:38:57 T-ORACLE73 chronyd[616]: System
clock wrong by 19.077230 seconds, adjustment
started<br class="gmail_msg">
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<div class="gmail_msg">Is this expected?</div>
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<div class="gmail_extra gmail_msg">Possibly the default changed at some
point in time, so that now it saves memory and so this implies
pause of VM</div>
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Saving memory is essential in some apàplications like DB, so you
won't bypass vm pauses for such a stuff</div></blockquote><div><br></div><div>In a database, you actually want to ensure all transactions are complete for an application-complete snapshot. I don't think memory is needed.</div><div>Y.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor="#FFFFFF" text="#000000" class="gmail_msg"><br class="gmail_msg">
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<div class="gmail_extra gmail_msg">In the mean time I verified changing
backup.py this way solves the problem (the 3.6 api deprecation
still in place... ;-):</div>
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<div class="gmail_extra gmail_msg">$ diff backup.py backup.py.orig </div>
<div class="gmail_extra gmail_msg">123c123</div>
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vm.snapshots.add(params.Snapshot(description=config.get_snapshot_description(),
vm=vm,persist_memorystate=False))</div>
<div class="gmail_extra gmail_msg">---</div>
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vm.snapshots.add(params.Snapshot(description=config.get_snapshot_description(),
vm=vm))</div>
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<div class="gmail_extra gmail_msg">The snapshot doesn't include memory
and no problem at VM OS side now</div>
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<div class="gmail_extra gmail_msg">Tested also getting the parameter
from config file</div>
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<div class="gmail_extra gmail_msg">Modifications needed in this case:</div>
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<div class="gmail_extra gmail_msg">1)</div>
<div class="gmail_extra gmail_msg">$ diff backup.py backup.py.orig <br class="gmail_msg">
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<div class="gmail_extra gmail_msg">123c123</div>
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vm.snapshots.add(params.Snapshot(description=config.get_snapshot_description(),
vm=vm,persist_memorystate=config.get_persist_memorystate()))</div>
<div class="gmail_extra gmail_msg">---</div>
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vm.snapshots.add(params.Snapshot(description=config.get_snapshot_description(),
vm=vm))</div>
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<div class="gmail_msg">2)</div>
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<div class="gmail_msg">$ diff config.py config.py.orig </div>
<div class="gmail_msg">34d33</div>
<div class="gmail_msg">< self.__persist_memorystate =
config_parser.getboolean(section, "persist_memorystate")</div>
<div class="gmail_msg">113,116d111</div>
<div class="gmail_msg">< </div>
<div class="gmail_msg">< </div>
<div class="gmail_msg">< def get_persist_memorystate(self):</div>
<div class="gmail_msg">< return self.__persist_memorystate</div>
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<div class="gmail_msg">And in config file called add:</div>
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<div class="gmail_msg"># Save Memory in snapshot</div>
<div class="gmail_msg">persist_memorystate=False</div>
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<div class="gmail_msg">It could be further improved if one wants to
differentiate save memory for some VMs and not for other
ones....</div>
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<div class="gmail_msg">HIH other ones,</div>
<div class="gmail_msg">Gianluca</div>
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</div><div bgcolor="#FFFFFF" text="#000000" class="gmail_msg"><pre class="m_322729499030084489moz-signature gmail_msg" 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="m_322729499030084489moz-txt-link-abbreviated gmail_msg" href="mailto:blanchet@abes.fr" target="_blank">blanchet@abes.fr</a> </pre>
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