[Freeswitch-users] Bad sound quality and Abnormally large timer gap 100953 detected!

Thu Jul 28 19:02:28 MSD 2011

Thanks,

I will make sure to add this to the wiki, I also have some more detailed information after all my testing, so I will make sure to get it all upp on the wiki.

/Peter
________________________________________
Från: freeswitch-users-bounces at lists.freeswitch.org [freeswitch-users-bounces at lists.freeswitch.org] f&#246;r Giovanni Maruzzelli [gmaruzz at celliax.org]
Skickat: den 28 juli 2011 11:33
Till: FreeSWITCH Users Help
Ämne: Re: [Freeswitch-users] Bad sound quality and Abnormally large timer gap 100953 detected!

Peter,

that's a pretty clear explanation, and answers many frequently asked questions.

Can you please add it to the wiki (eg: "FS on virtual machines", and
add links to it from "amazon" and "aws" related pages) ?

I'm sure lot of people will find it interesting, and hopefully some
other people (and/or you) will add more info and experiences to it.

-giovanni

On 7/28/11, Peter Olsson <peter.olsson at visionutveckling.se> wrote:
> I feel I need to explain my last statement a little further :)
>
> First of all, you can run FS on virtual machines (even though I never
> recommend it), but you need to be in control of the virtual environment, or
> totally trust the ones controlling it.
>
> There are two basic problems when running on virtual hardware - timing and
> network I/O. For timing to work you need to make sure that the one
> controlling the virtual environment NEVER give out more CPU cores then there
> are available on the hardware. If they give out more, and your machine need
> to share resources with another machine, you will be in trouble. As soon as
> the other virtual machine starts to load the CPU, your machine will get bad
> timing. Also - usually a one core VM will get better timing then a two+ core
> VM.
>
> Also, to be safe on the network side, you need your own NIC, that is not
> shared with other machines.
>
> If you feel you can control this, you might be successful with the setup, if
> you can't control this, you're either lucky (and things work anyway), or
> you'll get bad audio.
>
> Also, just passing RTP for normal call isn't the most critical issue (you
> don't even have to use a timer there), the most critical timing issues will
> occur in conferences or when using a local IVR on the machine.
>
> I've done lots of testing for this in my lab, since many of my customers
> wants to run our system (which uses FS for IVR/conferencing) on ESXi virtual
> hosts, and I've found the above to be quite critical to succeed with your
> virtual implementation.
>
> /Peter
>
> ____________________________
> Från: freeswitch-users-bounces at lists.freeswitch.org
> [freeswitch-users-bounces at lists.freeswitch.org] f&#246;r Giovanni Maruzzelli
> [gmaruzz at gmail.com]
> Skickat: den 28 juli 2011 09:37
> Till: FreeSWITCH Users Help
> Ämne: Re: [Freeswitch-users] Bad sound quality and Abnormally large timer
> gap 100953 detected!
>
> Hey guys 'n gal,
>
> the original post is asking for Windows!!!
>
> -giovanni
>
>
> On 7/28/11, Sam <lakersman2006 at yahoo.com> wrote:
>> i forgot to mention that the 50 to 60 calls also are doing majority of
>> g729
>> transcoding as well which does put th cpu to 85 to 90% full utilization.
>> So
>> don't knock virtual machines.
>>
>>
>>
>> ________________________________
>> From: Avi Marcus <avi at avimarcus.net>
>> To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
>> Sent: Wednesday, July 27, 2011 3:20 PM
>> Subject: Re: [Freeswitch-users] Bad sound quality and Abnormally large
>> timer
>> gap 100953 detected!
>>
>>
>> I'm running FS under Xen provided by Linode. I only run max 10 concurrent
>> channels in production, but an MOH test sounded good through 200
>> concurrent
>> channels.
>> Linode says the CPU is the most underused resource on their systems...
>>
>>
>> -Avi
>>
>>
>> On Thu, Jul 28, 2011 at 12:57 AM, Michael Collins <msc at freeswitch.org>
>> wrote:
>>
>>
>>>
>>>
>>>On Wed, Jul 27, 2011 at 2:24 PM, Sam <lakersman2006 at yahoo.com> wrote:
>>>
>>>I run Asterisk on a virtual machine and it runs quite well even with
>>> approximately 50 to 60 simultaneous callers and tha'ts even with media
>>> passing thru it.
>>>>
>>>That's actually pretty impressive. What version of Asterisk do you use?
>>> And
>>> do you have to continually make sacrifices to the digital gods to keep
>>> them appeased? :P
>>>
>>>-MC
>>>_______________________________________________
>>>Join us at ClueCon 2011, Aug 9-11, Chicago
>>>http://www.cluecon.com 877-7-4ACLUE
>>>
>>>FreeSWITCH-users mailing list
>>>FreeSWITCH-users at lists.freeswitch.org
>>>http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
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>>>http://www.freeswitch.org
>>>
>>>
>>
>> _______________________________________________
>> Join us at ClueCon 2011, Aug 9-11, Chicago
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>
> --
> Sent from my mobile device
>
> Sincerely,
>
> Giovanni Maruzzelli
> Cell : +39-347-2665618
>
> _______________________________________________
> Join us at ClueCon 2011, Aug 9-11, Chicago
> http://www.cluecon.com 877-7-4ACLUE
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>
>
>
>
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> http://www.cluecon.com 877-7-4ACLUE
>
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--
Sent from my mobile device

Sincerely,

Giovanni Maruzzelli
Cell : +39-347-2665618

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