On Thu, Sep 29, 2011 at 8:13 AM, Glen Kent <glen.kent@gmail.com> wrote:
I also wonder about the kind of servers facebook must be having to be able to manage millions of TCP connections that must be terminating there.
For what it's worth, with some kernel tuning you can maintain 500k - 1MM persistent connections on a mid-range Linux box. Providers of mobile push-notification services seem to be the ones most actively pushing these limits publicly. Urban Airship has posted some information on how they maintain 500k connections on EC2 m1.large instances: http://urbanairship.com/blog/2010/08/24/c500k-in-action-at-urban-airship/ http://urbanairship.com/blog/2010/09/29/linux-kernel-tuning-for-c500k/ WhatsApp claim to be able to maintain 1MM connections on single machine, although details are thin: http://blog.whatsapp.com/index.php/2011/09/one-million/ http://news.ycombinator.com/item?id=3028547 (discussion) -n