[Freeswitch-users] KVM vs. XEN virtualization

Wed Apr 8 00:01:36 MSD 2015

No fax so far. Planned.
Ubuntu. Lts.
El 07/04/2015 15:26, "Brian West" <brian at freeswitch.org> escribió:

> Do you happen to do faxing on EC2?  Also what distro do you run on your
> instances?
>
> On Tue, Apr 7, 2015 at 2:22 PM, Victor Medina <victor.medina at cibersys.com>
> wrote:
>
>> Price aside... we have no issues so far with Amazon. Carlos.
>>
>> 2015-04-05 19:22 GMT-04:30 Carlos Ruiz Díaz <carlos.ruizdiaz at gmail.com>:
>>
>> This makes me wonder whether to stick with DO or migrate to Amazon.
>>>
>>> Any advice on EC2 quality compared to DO?
>>>
>>> On Sun, Apr 5, 2015 at 5:33 PM, Stanislav Sinyagin <ssinyagin at gmail.com>
>>> wrote:
>>>
>>>> I made additional tests by sending calls to sipgate.co.uk, and they
>>>> confirm my results: when sending a call from my Xen server in Switzerland,
>>>> the received audio is always perfect. But when sending from a Digitalocean
>>>> host in Amsterdam, I get the slipping frames.
>>>>
>>>> I will re-test again during a business day, when the servers are likely
>>>> to be more busy.
>>>>
>>>>
>>>>
>>>> On Sun, Apr 5, 2015 at 12:47 PM, Stanislav Sinyagin <
>>>> ssinyagin at gmail.com> wrote:
>>>>
>>>>> Yrs, jitter buffer was enabled. Here I'm pretty sure that we deal with
>>>>> the clock skew.
>>>>> On Apr 5, 2015 12:07 PM, "Brian West" <brian at freeswitch.org> wrote:
>>>>>
>>>>>> Correct me if I'm wrong but is sounds like you've described jitter.
>>>>>> Did you test with the jitter buffer enabled?
>>>>>>
>>>>>> On Sunday, April 5, 2015, Regis M <regis.freeswitch.org at tornad.net>
>>>>>> wrote:
>>>>>>
>>>>>>> nice work !!!  Thanks for sharing.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> 2015-04-05 2:37 GMT+02:00 Stanislav Sinyagin <ssinyagin at gmail.com>:
>>>>>>>
>>>>>>>> here we go:
>>>>>>>>
>>>>>>>> https://txlab.wordpress.com/2015/04/05/testing-rtp-clock-precision-on-a-virtual-machine/
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> On Sat, Apr 4, 2015 at 4:26 PM, Stanislav Sinyagin <
>>>>>>>> ssinyagin at gmail.com> wrote:
>>>>>>>> > On Sat, Apr 4, 2015 at 1:03 PM, Regis M <
>>>>>>>> regis.freeswitch.org at tornad.net> wrote:
>>>>>>>> >> How do you check wavs together in audacity ?
>>>>>>>> >
>>>>>>>> > you just open two WAV files, align their starting position, and
>>>>>>>> > visually check the waves. If there's a problem, you would see that
>>>>>>>> > after few seconds, the waves are not aligned any more.
>>>>>>>> >
>>>>>>>> >> Can you send me 2 samples wav (send... and recorded) so I could
>>>>>>>> see the 20ms
>>>>>>>> >> diff that you exposed...
>>>>>>>> >>
>>>>>>>> >> Is there a way to automate the result checking, so it could help
>>>>>>>> to monitor
>>>>>>>> >> itsp quality
>>>>>>>> >
>>>>>>>> > Here
>>>>>>>> > https://github.com/openpreserve/scape-xcorrsound/issues/17
>>>>>>>> > this is a link to a tool which compares two sound files at the
>>>>>>>> wave
>>>>>>>> > level. You can also see the sound samples in the ticket.
>>>>>>>> > The problem is, that currently this tool does not detect such
>>>>>>>> slipping frames.
>>>>>>>> >
>>>>>>>> > I will also write a detailed article with examples, during the
>>>>>>>> weekend.
>>>>>>>> >
>>>>>>>> >
>>>>>>>> >
>>>>>>>> >
>>>>>>>> >
>>>>>>>> >>
>>>>>>>> >>
>>>>>>>> >> 2015-04-04 12:53 GMT+02:00 Stanislav Sinyagin <
>>>>>>>> ssinyagin at gmail.com>:
>>>>>>>> >>>
>>>>>>>> >>> Important is to send the media through two independent carriers
>>>>>>>> - then you
>>>>>>>> >>> can be sure that your clock is compared against a high quality
>>>>>>>> one.
>>>>>>>> >>>
>>>>>>>> >>> On Apr 4, 2015 12:46 PM, "Regis M" <
>>>>>>>> regis.freeswitch.org at tornad.net>
>>>>>>>> >>> wrote:
>>>>>>>> >>>>
>>>>>>>> >>>> Hi,
>>>>>>>> >>>>
>>>>>>>> >>>> It's a very interresting test and conclusion.
>>>>>>>> >>>>
>>>>>>>> >>>> I will try to build a similar environnement on my freeswitch
>>>>>>>> to check
>>>>>>>> >>>> some system :)
>>>>>>>> >>>>
>>>>>>>> >>>> thanks
>>>>>>>> >>>>
>>>>>>>> >>>>
>>>>>>>> >>>>
>>>>>>>> >>>> 2015-04-04 2:16 GMT+02:00 Stanislav Sinyagin <
>>>>>>>> ssinyagin at gmail.com>:
>>>>>>>> >>>>>
>>>>>>>> >>>>> hi,
>>>>>>>> >>>>>
>>>>>>>> >>>>> Here are some test results which might be interesting:
>>>>>>>> >>>>>
>>>>>>>> >>>>> I've set up a test FreeSWITCH server at digitalocean (they
>>>>>>>> use KVM),
>>>>>>>> >>>>> and originated test calls to some ITSP accounts. Each call
>>>>>>>> played a
>>>>>>>> >>>>> test sound file (voice samples from ITU:
>>>>>>>> >>>>>
>>>>>>>> http://www.itu.int/net/itu-t/sigdb/genaudio/AudioForm-g.aspx?val=1000050
>>>>>>>> >>>>> ), and on the receiving end another FreeSWITCH server was
>>>>>>>> recording
>>>>>>>> >>>>> the received session. The receiving server was on a XEN VM.
>>>>>>>> Both
>>>>>>>> >>>>> servers talked G711 to their corresponding ITSP accounts.
>>>>>>>> >>>>>
>>>>>>>> >>>>> Then I compared the source audio and received audio in
>>>>>>>> Audacity editor.
>>>>>>>> >>>>>
>>>>>>>> >>>>> The tests showed that the received voice wave shifts 20ms
>>>>>>>> from the
>>>>>>>> >>>>> original sound every few seconds, randomly back and forward.
>>>>>>>> This
>>>>>>>> >>>>> skewing was always present, regardless of ITSP and time of
>>>>>>>> day.
>>>>>>>> >>>>>
>>>>>>>> >>>>> Then I moved the sending server to a XEN VM, and the waves
>>>>>>>> appeared
>>>>>>>> >>>>> almost perfectly synchronized (there was a 5ms skew in one
>>>>>>>> test, and I
>>>>>>>> >>>>> guess it's related to transcoding buffer, as the sound was
>>>>>>>> obviously
>>>>>>>> >>>>> transcoded).
>>>>>>>> >>>>>
>>>>>>>> >>>>> The effect was always visible with a 30-second sample, and I
>>>>>>>> also made
>>>>>>>> >>>>> additional tests with 2-minute samples.
>>>>>>>> >>>>>
>>>>>>>> >>>>> It would also be interesting to test this from a VmWare VM.
>>>>>>>> If someone
>>>>>>>> >>>>> wants to run such a test, feel free to contact me directly.
>>>>>>>> >>>>>
>>>>>>>> >>>>>
>>>>>>>> >>>>> cheers,
>>>>>>>> >>>>> stan
>>>>>>>> >>>>>
>>>>>>>> >>>>>
>>>>>>>> >>>>>
>>>>>>>> _________________________________________________________________________
>>>>>>>> >>>>> Professional FreeSWITCH Consulting Services:
>>>>>>>> >>>>> consulting at freeswitch.org
>>>>>>>> >>>>> http://www.freeswitchsolutions.com
>>>>>>>> >>>>>
>>>>>>>> >>>>> Official FreeSWITCH Sites
>>>>>>>> >>>>> http://www.freeswitch.org
>>>>>>>> >>>>> http://confluence.freeswitch.org
>>>>>>>> >>>>> http://www.cluecon.com
>>>>>>>> >>>>>
>>>>>>>> >>>>> FreeSWITCH-users mailing list
>>>>>>>> >>>>> FreeSWITCH-users at lists.freeswitch.org
>>>>>>>> >>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>>>>> >>>>> UNSUBSCRIBE:
>>>>>>>> http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>>>> >>>>> http://www.freeswitch.org
>>>>>>>> >>>>
>>>>>>>> >>>>
>>>>>>>> >>>>
>>>>>>>> >>>>
>>>>>>>> _________________________________________________________________________
>>>>>>>> >>>> Professional FreeSWITCH Consulting Services:
>>>>>>>> >>>> consulting at freeswitch.org
>>>>>>>> >>>> http://www.freeswitchsolutions.com
>>>>>>>> >>>>
>>>>>>>> >>>> Official FreeSWITCH Sites
>>>>>>>> >>>> http://www.freeswitch.org
>>>>>>>> >>>> http://confluence.freeswitch.org
>>>>>>>> >>>> http://www.cluecon.com
>>>>>>>> >>>>
>>>>>>>> >>>> FreeSWITCH-users mailing list
>>>>>>>> >>>> FreeSWITCH-users at lists.freeswitch.org
>>>>>>>> >>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>>>>> >>>> UNSUBSCRIBE:
>>>>>>>> http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>>>> >>>> http://www.freeswitch.org
>>>>>>>> >>>
>>>>>>>> >>>
>>>>>>>> >>>
>>>>>>>> _________________________________________________________________________
>>>>>>>> >>> Professional FreeSWITCH Consulting Services:
>>>>>>>> >>> consulting at freeswitch.org
>>>>>>>> >>> http://www.freeswitchsolutions.com
>>>>>>>> >>>
>>>>>>>> >>> Official FreeSWITCH Sites
>>>>>>>> >>> http://www.freeswitch.org
>>>>>>>> >>> http://confluence.freeswitch.org
>>>>>>>> >>> http://www.cluecon.com
>>>>>>>> >>>
>>>>>>>> >>> FreeSWITCH-users mailing list
>>>>>>>> >>> FreeSWITCH-users at lists.freeswitch.org
>>>>>>>> >>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>>>>> >>> UNSUBSCRIBE:
>>>>>>>> http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>>>> >>> http://www.freeswitch.org
>>>>>>>> >>
>>>>>>>> >>
>>>>>>>> >>
>>>>>>>> >>
>>>>>>>> _________________________________________________________________________
>>>>>>>> >> Professional FreeSWITCH Consulting Services:
>>>>>>>> >> consulting at freeswitch.org
>>>>>>>> >> http://www.freeswitchsolutions.com
>>>>>>>> >>
>>>>>>>> >> Official FreeSWITCH Sites
>>>>>>>> >> http://www.freeswitch.org
>>>>>>>> >> http://confluence.freeswitch.org
>>>>>>>> >> http://www.cluecon.com
>>>>>>>> >>
>>>>>>>> >> FreeSWITCH-users mailing list
>>>>>>>> >> FreeSWITCH-users at lists.freeswitch.org
>>>>>>>> >> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>>>>> >> UNSUBSCRIBE:
>>>>>>>> http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>>>> >> http://www.freeswitch.org
>>>>>>>>
>>>>>>>>
>>>>>>>> _________________________________________________________________________
>>>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>>>> consulting at freeswitch.org
>>>>>>>> http://www.freeswitchsolutions.com
>>>>>>>>
>>>>>>>> Official FreeSWITCH Sites
>>>>>>>> http://www.freeswitch.org
>>>>>>>> http://confluence.freeswitch.org
>>>>>>>> http://www.cluecon.com
>>>>>>>>
>>>>>>>> FreeSWITCH-users mailing list
>>>>>>>> FreeSWITCH-users at lists.freeswitch.org
>>>>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>>>>> UNSUBSCRIBE:
>>>>>>>> http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>>>> http://www.freeswitch.org
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> --
>>>>>>
>>>>>> *Brian West*
>>>>>> brian at freeswitch.org
>>>>>>
>>>>>>
>>>>>> *Twitter: @FreeSWITCH , @briankwest*
>>>>>> http://www.freeswitchbook.com
>>>>>> http://www.freeswitchcookbook.com
>>>>>>
>>>>>> ClueCon 2015 Call for Speakers
>>>>>> <https://www.cluecon.com/call-for-speakers/> | Register
>>>>>> <https://freeswitch.com/cart.php?gid=1> TODAY! | Reddit:
>>>>>> /r/freeswitch <https://www.reddit.com/r/freeswitch>
>>>>>>
>>>>>> *T:*+19184209001 | *F:*+19184209002 | *M:*+1918424WEST (9378)
>>>>>> *iNUM:*+883 5100 1420 9001 | *ISN:*410*543 | *Skype:*briankwest
>>>>>>
>>>>>>
>>>>>>
>>>>>> _________________________________________________________________________
>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>> consulting at freeswitch.org
>>>>>> http://www.freeswitchsolutions.com
>>>>>>
>>>>>> Official FreeSWITCH Sites
>>>>>> http://www.freeswitch.org
>>>>>> http://confluence.freeswitch.org
>>>>>> http://www.cluecon.com
>>>>>>
>>>>>> FreeSWITCH-users mailing list
>>>>>> FreeSWITCH-users at lists.freeswitch.org
>>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>>> UNSUBSCRIBE:
>>>>>> http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>> http://www.freeswitch.org
>>>>>>
>>>>>
>>>>
>>>>
>>>> _________________________________________________________________________
>>>> Professional FreeSWITCH Consulting Services:
>>>> consulting at freeswitch.org
>>>> http://www.freeswitchsolutions.com
>>>>
>>>> Official FreeSWITCH Sites
>>>> http://www.freeswitch.org
>>>> http://confluence.freeswitch.org
>>>> http://www.cluecon.com
>>>>
>>>> FreeSWITCH-users mailing list
>>>> FreeSWITCH-users at lists.freeswitch.org
>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>> UNSUBSCRIBE:
>>>> http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>> http://www.freeswitch.org
>>>>
>>>
>>>
>>>
>>> --
>>> Carlos
>>> http://caruizdiaz.com
>>>
>>> _________________________________________________________________________
>>> Professional FreeSWITCH Consulting Services:
>>> consulting at freeswitch.org
>>> http://www.freeswitchsolutions.com
>>>
>>> Official FreeSWITCH Sites
>>> http://www.freeswitch.org
>>> http://confluence.freeswitch.org
>>> http://www.cluecon.com
>>>
>>> FreeSWITCH-users mailing list
>>> FreeSWITCH-users at lists.freeswitch.org
>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>>> http://www.freeswitch.org
>>>
>>
>>
>>
>> --
>>
>>
>>
>> Víctor E. Medina M.
>> Platform Architect / Chief Infrastructure
>> +58424 291 4561
>> BB #79A8AFA2
>> @VMCibersys
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://confluence.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-users mailing list
>> FreeSWITCH-users at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>> http://www.freeswitch.org
>>
>
>
>
> --
>
> *Brian West*
> brian at freeswitch.org
>
>
> *Twitter: @FreeSWITCH , @briankwest*
> http://www.freeswitchbook.com
> http://www.freeswitchcookbook.com
>
> ClueCon 2015 Call for Speakers
> <https://www.cluecon.com/call-for-speakers/> | Register
> <https://freeswitch.com/cart.php?gid=1> TODAY! | Reddit: /r/freeswitch
> <https://www.reddit.com/r/freeswitch>
>
> *T:*+19184209001 | *F:*+19184209002 | *M:*+1918424WEST (9378)
> *iNUM:*+883 5100 1420 9001 | *ISN:*410*543 | *Skype:*briankwest
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://confluence.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org
>
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