> uh, you can get a packet from your software on one machine, through a switch and into your software on the second machine in 1-2us if you know what you're doing
This isn’t a pair of servers sitting in a room with a switch in between them on a simple /24 subnet. It’s a gigantic cloud data center with a massive network spanning a huge number of devices.
The simple things you can get to work in a small setup don’t apply at this scale.
the example I gave was a simplified (though true) situation of a system local bus
it's common to have a dedicated trading network completely parallel and isolated from the main DC network for each upstream connection, of which there are dozens
and these are (at least) double redundant through the entire network, typically using redundant packet arbitration to near guarantee zero drops over a session
Google's network is super-dynamic and flexible, but slow and likely over-contended
This isn’t a pair of servers sitting in a room with a switch in between them on a simple /24 subnet. It’s a gigantic cloud data center with a massive network spanning a huge number of devices.
The simple things you can get to work in a small setup don’t apply at this scale.