[Freeswitch-users] AWS Instance Recommendations

[Colin Morelli]

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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