[Freeswitch-users] AWS Instance Recommendations

[Oleg Stolyar]

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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