[Freeswitch-users] FreeSWITCH HA + Loadbalancing

[Ken Rice]

It is not possible to do a live migration at all right now... There is no
way to move a call and have all the states required for that call to
magically re-appear on a different instance. This will require a fair bit of
work to get there. 

It is possible to configure fs via some back end DB magic to share
configurations ie: n+1 or ³warm standby² style fault tolerance but you are
going to loose the calls that are up when the failure occurs.


From: Raimund Sacherer <rs at runsolutions.com>
Reply-To: <freeswitch-users at lists.freeswitch.org>
Date: Sat, 29 Aug 2009 20:33:21 +0200
To: <freeswitch-users at lists.freeswitch.org>
Subject: Re: [Freeswitch-users] FreeSWITCH HA + Loadbalancing

Hmm, so basically 100 interested companys which each chip in 1000 bucks :-)

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?

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 ...

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.


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 ...


-- 
Raimund Sacherer
-
RunSolutions
    Open Source It Consulting
-

Parc Bit - Centro Empresarial Son Espanyol
Edificio Estel - Local 3D
07121 -  Palma de Mallorca
Baleares

On Aug 29, 2009, at 6:01 PM, Anthony Minessale wrote:

> 
> 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.
> 
> 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.
> 
> It may or may not be worth it to raise that kind of funding just to avoid an
> occasional disaster.
> 
> Then there is a matter of securing the time of the developers necessary to
> carry out the implementation.
> 
> 
>> On Aug 29, 2009 10:19 AM, "Brian West" <brian at freeswitch.org> wrote:
>> 
>> I was able to do this using OpenVZ, You can get away with it on
>> smaller instances... like if you're doing one instance per company but
>> don't expect live migration to work as well on large instances with
>> thousands of calls up at once. You need a fast network, fast disks and
>> to follow the howto on the wiki.
>> 
>> /b
>> 
>> On Aug 29, 2009, at 4:58 AM, Steve Kurzeja wrote: > You still have hardware
>> failures and fail-over...
>> 
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