Stack Overflow公开了2016年的架构
http://goo.gl/K09Jfp
After you find our secret hideout, HTTP traffic comes from one of our four ISPs
(Level 3, Zayo, Cogent, and Lightower in New York) and flows
through one of our four edge routers. We peer with our ISPs using BGP
(fairly standard) in order to control the flow of traffic and provide
several avenues for traffic to reach us most efficiently.
内文提到他们跟4间isp做介接跑bgp
I suppose this may be a good time to mention we have a 10Gbps MPLS between
our 2 data centers
两个数据中心之间有10g的mpls连接
这边有他们更详细硬件规划
http://goo.gl/wgpH3O
在sql server的部份他们是特别挑了高时脉的的CPU,并且用上了
intel p3700 nvme ssd.
他们的负载平衡不是用大家熟悉的F5 or A10,他们用的是haproxy
整套弄下来三四千万是跑不掉.