<div dir="auto"><div><br><div class="gmail_extra"><br><div class="gmail_quote">On Feb 10, 2017 3:21 PM, "Nathanaël Blanchet" <<a href="mailto:blanchet@abes.fr">blanchet@abes.fr</a>> wrote:<br type="attribution"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div class="m_5879815440058227512moz-cite-prefix">Le 09/02/2017 à 19:48, Yaniv Kaul a
écrit :<br>
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<div class="gmail_quote">On Thu, Feb 9, 2017 at 6:00 PM, Doug
Ingham <span dir="ltr"><<a href="mailto:dougti@gmail.com" target="_blank">dougti@gmail.com</a>></span>
wrote:<br>
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<div class="gmail_quote"><span>On 9 February
2017 at 12:03, Dan Yasny <span dir="ltr"><<a href="mailto:dyasny@gmail.com" target="_blank">dyasny@gmail.com</a>></span>
wrote:<br>
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<div class="gmail_quote"><span class="m_5879815440058227512m_5385279511923747685gmail-">On
Thu, Feb 9, 2017 at 9:55 AM, Doug Ingham
<span dir="ltr"><<a href="mailto:dougti@gmail.com" target="_blank">dougti@gmail.com</a>></span>
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<div dir="ltr">Hi Dan,<br>
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<div class="gmail_quote"><span>On
8 February 2017 at 18:26, Dan
Yasny <span dir="ltr"><<a href="mailto:dyasny@gmail.com" target="_blank">dyasny@gmail.com</a>></span>
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<div>But seriously,
above all, I'd
recommend you backup
the engine (it comes
with a utility)
often and well. I do
it via cron every
hour in production,
keeping a rotation
of hourly and daily
backups, just in
case. It doesn't
take much space or
resources, but it's
more than just best
practice - that
database is the
summary of the
entire setup.</div>
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<div>If you don't mind, may I
ask what process you use for
backing up your engine? If you
use HE, do you keep one server
dedicated to just that VM?<br>
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<div>I've not had that
particular issue in the
restore process yet, however I
read that it's recommended the
HE host is free of virtual
load before the backup takes
place. And as they need to be
done frequently, I'm reading
that as a dedicated host...<span class="m_5879815440058227512m_5385279511923747685gmail-m_-816755705011915139HOEnZb"><font color="#888888"><br>
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<div>If you use a dedicated host, you
might as well abandon self hosted. HE is
nice for small setups with the HA built
in for extra fun, but once you scale, it
might not be able to cope and you'll
need real hardware. You're running a
heavy-ish java engine plus two databases
after all. <br>
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I'd be interested to know what type of scale needs a real hardware
for engine, rather 100 vms or 1000 vms? it may be about the hosts
number?</div></blockquote></div></div></div><div dir="auto"><br></div><div dir="auto">It depends on many factors. Just saw someone who is running the engine as a VM on a hefty hardware, and his setup had 50 hosts and 2500 VMs. I don't know all the details and specifically what I'd be interested to know is the underlying storage performance and how it's connected. </div><div dir="auto">In any case, as you scale up the system you will need more vCPUs and memory. </div><div dir="auto"><br></div><div dir="auto">Lastly, in 4.1 we've made various improvements to the engine and its database usage, so I expect somewhat improved performance and scale. </div><div dir="auto">Y. </div><div dir="auto"><br></div><div dir="auto"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor="#FFFFFF" text="#000000"><div class="quoted-text"><br>
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<div>So as I said, all I do is add the
engine-backup command to cron on the
engine, and then my backup server comes
in and pulls out the files via scp, also
through cron. Nothing fancy really, but
it lets me sleep at night</div>
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<div>This particular project has 10 new maxed out
servers to back it, and I don't see it outgrowing
that for at least a year or so. It's hardly a full
DC.<br>
I presume the DB will become the heaviest part of
the load, and I'm already planning a separate high
I/O environment for dedicated HA DB hosts.<br>
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<div>See the top section of this page:</div>
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<a href="http://www.ovirt.org/documentation/self-hosted/chap-Backing_up_and_Restoring_an_EL-Based_Self-Hosted_Environment" target="_blank">http://www.ovirt.org/documenta<wbr>tion/self-hosted/chap-Backing_<wbr>up_and_Restoring_an_EL-Based_<wbr>Self-Hosted_Environment</a><br>
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<div class="gmail_extra">It seems that I'll always have
to keep at least one host free to be able to avoid
restore problems. If not, and I were to keep hourly
backups, then migrating VMs off the host every hour
would just be a pain.</div>
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<div>I don't see the point in an hourly backup. Of what? The
DB? The VM? What storage will it be based on?</div>
<div>I suggest revising the strategy.</div>
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-- <br>
<div class="m_5879815440058227512m_5385279511923747685gmail_signature">Doug</div>
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</div><font color="#888888"><pre class="m_5879815440058227512moz-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
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