They run siri in their own datacenter ontop of Mesos: https://www.infoq.com/news/2015/05/mesos-powers-apple-siri https://www.infoq.com/news/2015/05/mesos-power

They run siri in their own datacenter ontop of Mesos: https://www.infoq.com/news/2015/05/mesos-powers-apple-siri https://www.infoq.com/news/2015/05/mesos-powers-apple-siri I was at mesoscon a few (several?) years ago when they announced it and gave a talk regarding the tech side of things.