[Freeswitch-users] AWS Instance Recommendations

[Oleg Stolyar]

I don't see why c4 should not work as well but if you are transcoding, OPUS
takes 2-3 times the CPU of


On Thu, Feb 16, 2017 at 3:01 PM, Colin Morelli <colin.morelli at gmail.com>
wrote:

> Thanks for the info, Oleg.
>
> Do you know what AMI you're running? Kernel version? Etc. We opted for the
> c4s out of an assumption that our configuration would lend itself to being
> more CPU hungry than memory hungry (we're using opus)
>
> Colin
>
> On Thu, Feb 16, 2017 at 5:52 PM, Oleg Stolyar <olegstolyar at gmail.com>
> wrote:
>
>> I have been running FS on m3.2xlarge instances for a long time without
>> issues.
>>
>> With a mix of G.722 and G.711 it handles up to 250-300 concurrent
>> calls/conferences with transcoding although we try to not let it go above
>> 200.
>>
>> On Thu, Feb 16, 2017 at 2:12 PM, Colin Morelli <colin.morelli at gmail.com>
>> wrote:
>>
>>> Stanislav,
>>>
>>> Sorry about that - I hadn't seen your reply! Understood on your
>>> suggestions. I guess my ultimate question is - is virtualization still a
>>> huge problem aside from noisy neighbors? AWS of course allows you to get
>>> dedicated instances (albeit expensive), but you're still running in a VM.
>>>
>>> The complexity of including another data center in the infrastructure is
>>> a bit too much for this use case, but as mentioned - it'll definitely move
>>> this way over time.
>>>
>>> Joel,
>>>
>>> Nothing other than what's on this thread. However, I will say that I
>>> moved from Ubuntu to an Amazon Linux AMI, moved logging from direct to disk
>>> out to syslog (with async writes to disk), and increased the instance size
>>> to a c4.xlarge, and users are reporting considerable improvements.
>>>
>>> Best,
>>> Colin
>>> On Thu, Feb 16, 2017 at 5:01 PM Joel Serrano <joel at gogii.net> wrote:
>>>
>>>> Hi Colin,
>>>>
>>>> Did you get any more info on FS on AWS? I'm interested on this also.
>>>>
>>>> Thanks,
>>>> Joel.
>>>> On Mon, Feb 13, 2017 at 6:43 AM, Colin Morelli <colin.morelli at gmail.com
>>>> > wrote:
>>>>
>>>> Hey list,
>>>>
>>>> I'll start by saying I have read the warnings and recommendations to
>>>> *not* run FS on virtualized hardware. For right now, though, it's
>>>> really the only option for me. I don't anticipate nor will I expect the
>>>> behavior to be the same as what I would get on physical hosts, but would
>>>> just like it to be as consistent (and good) as possible given the
>>>> constraints.
>>>>
>>>> My question is - does anyone have particular kernel and instance type
>>>> recommendations for AWS? I'm getting relatively frequent jitter and what
>>>> seem like timing-related issues on calls, even in simple device <-> device
>>>> calls within FS (no external gateway involved). I'm currently running FS in
>>>> a Debian 8 docker container (with no memory or CPU limits) on a c4.large
>>>> Ubuntu 16.04 host (kernel 4.4.0-45, default 250hz timer). The particular
>>>> behavior I'm seeing *feels and sounds* like a few frames of silence,
>>>> followed up by the audio being sped up slightly for a second or two (almost
>>>> like it's trying to catch up), happening occasionally throughout calls.
>>>> Note that this is with one call, and ~5% CPU usage on the host. Thus I'm
>>>> pointing a finger most likely at kernel timer resolution. Running time_test
>>>> 100 on FS returns an average of 200, which seems pretty bad.
>>>>
>>>> I've heard people have better success with the Amazon Linux AMIs for
>>>> their packaged kernels. Is this true? Would recompiling the kernel with a
>>>> 1000hz timer help a lot here?
>>>>
>>>> If you're having success on AWS, would be great to know what AMI you're
>>>> based off of, what kernel version (and timer), and instance size. Thanks in
>>>> advance.
>>>>
>>>> Best,
>>>> Colin
>>>>
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>>
>>
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>
>
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