On Tue, Dec 1, 2015 at 5:27 PM, Gregory Szorc <g...@mozilla.com> wrote:

>
> On Tue, Dec 1, 2015 at 2:21 PM, Chris AtLee <cat...@mozilla.com> wrote:
>
>> Right now we've got debug OSX builds in the cloud on Try in parallel with
>> the regular builds. There's a bunch more work to be done there to be able
>> to switch over, but we're definitely making progress.
>>
>> All Windows / OSX unit tests are currently done on our own infra. Q
>> Fortier
>> is working on getting Windows unittests stood up in AWS, and the results
>> are very promising. I'm not sure when we'll be able to switch over yet
>> though. There are no obvious solutions for OSX test infrastructure other
>> than maintaining our own racks of minis.
>>
>> Perf tests on all platforms will stay on hardware for now. Some people
>> have
>> done experiments on EC2 to see how talos performs, but I don't think we
>> know enough about the impact of this to decide if we can move these off
>> bare metal or not.
>>
>
> Amazon now supports dedicated instances, which means you fully control
> what runs on the machine and other random tenants aren't fighting you for
> CPU and I/O. Assuming the performance variance from other tenants is what
> was preventing us from moving Talos to AWS, that blocker may no longer
> exist.
>

I think you probably want Dedicated Hosts rather than dedicated instances,
otherwise multiple of your own workloads could end up on the same physical
box I think. https://aws.amazon.com/ec2/dedicated-hosts/

I have two main concerns with dedicated infra on AWS:
* You're still running under a hypervisor of some kind; will it introduce
too much noise into the results? Seems like a worthwhile experiment!

* Dedicated host pricing is quite a bit more expensive than what we're
paying now for test infrastructure.
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