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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Also please remember this means every _<i>application</i>_ also
must be “failover” aware. So, if you’re using a little
calling card or billing app to control your routing, that app will have to explicitly
enroll its state as well as restore itself. <o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Live migration is possible via OpenVZ. OVZ does not have the
same overhead of other virtualization techniques such as Hyper-V, ESX, Xen,
etc. So you can do media without much worry. OVZ can work with other
virtualization, too; you can spin it up inside of a VMware machine. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>But this is *<b>live</b>* migration of the container. It’s
“just” pausing your container, copying the whole memory, and
resuming it on another node. This is not “dead” migration or
failover after calls break. However, you could try running a very frequent sync
in OVZ, so that if there was a node failure, you could resume from a previously
saved state. But, I highly doubt performance would be good enough for this to
work successfully on any serious deployment.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>-Michael<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> freeswitch-users-bounces@lists.freeswitch.org
[mailto:freeswitch-users-bounces@lists.freeswitch.org] <b>On Behalf Of </b>Raimund
Sacherer<br>
<b>Sent:</b> Saturday, August 29, 2009 12:33 PM<br>
<b>To:</b> freeswitch-users@lists.freeswitch.org<br>
<b>Subject:</b> Re: [Freeswitch-users] FreeSWITCH HA + Loadbalancing<o:p></o:p></span></p>
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<p class=MsoNormal>Hmm, so basically 100 interested companys which each chip in
1000 bucks :-)<o:p></o:p></p>
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<p class=MsoNormal>sounds like lots of manpower, but on the other hand, I do
not know the issues regarding the SIP protocoll, but, basically, isn't it *just*
to tell another FS box to listen on port x for voicetraffic, forward it to ip
on port y?<o:p></o:p></p>
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<p class=MsoNormal>ok, i understand there's a lot going on under the hood, i
guess it would mean to setup a call, but take care to not really set up the
call, just the internal state ...<o:p></o:p></p>
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<p class=MsoNormal>hmm, could it theoretically be done with the event system?
ok, i guess I have to dive further into the internals to fully understand the
scope.<o:p></o:p></p>
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<p class=MsoNormal>But a live migration, where the box is available, be
possible right now? Would be a step i would like to implement just to be able
to do work on a hardware node if necesary without interrupting the service ...<o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";
color:black'>-- <br>
Raimund Sacherer<o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";
color:black'>-<br>
RunSolutions<br>
Open Source It Consulting<br>
-<br>
<br>
Parc Bit - Centro Empresarial Son Espanyol<br>
Edificio Estel - Local 3D<br>
07121 - Palma de Mallorca<br>
Baleares<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>On Aug 29, 2009, at 6:01 PM, Anthony Minessale wrote:<o:p></o:p></p>
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<br>
<o:p></o:p></p>
<p>We have previously estimated the development of live fail over (after a box
dies where live migration is no longer possible) to exceed 100k in development
costs.<o:p></o:p></p>
<p>It requires several additions to the sofia sip library, freeswitch and a
dependancy on some other code we would have to implement to manage it.<o:p></o:p></p>
<p>It may or may not be worth it to raise that kind of funding just to avoid an
occasional disaster.<o:p></o:p></p>
<p>Then there is a matter of securing the time of the developers necessary to
carry out the implementation.<o:p></o:p></p>
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<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'>
<p class=MsoNormal>On Aug 29, 2009 10:19 AM, "Brian West" <<a
href="mailto:brian@freeswitch.org">brian@freeswitch.org</a>> wrote:<br>
<br>
I was able to do this using OpenVZ, You can get away with it on<br>
smaller instances... like if you're doing one instance per company but<br>
don't expect live migration to work as well on large instances with<br>
thousands of calls up at once. You need a fast network, fast disks and<br>
to follow the howto on the wiki.<br>
<span style='color:#888888'><br>
/b</span><o:p></o:p></p>
<p><span style='color:#500050'>On Aug 29, 2009, at 4:58 AM, Steve Kurzeja
wrote: > You still have hardware failures and fail-over...</span><o:p></o:p></p>
<p><span style='color:#500050'>_______________________________________________
FreeSWITCH-users mailing list FreeSWITCH-users@lists...</span><o:p></o:p></p>
</blockquote>
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<p class=MsoNormal>_______________________________________________<br>
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http://lists.freeswitch.org/mailman/listinfo/freeswitch-users<br>
UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users<br>
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