3 ms·
One thing missing from this analysis is the networking cost. The EC2 instance comes with 14gb/sec of dedicated EBS bandwidth and 25gb/sec of network bandwidth.
by packetslave 8y ago
One thing missing from this analysis is the networking cost. The EC2 instance comes with 14gb/sec of dedicated EBS bandwidth and 25gb/sec of network bandwidth. That implies a 40gb NIC, which will require a 40gb top of rack switch and enough cross-sectional bandwidth in the datacenter fabric to handle however many of these machines they plan for (at whatever oversubscription ratio, if any).
That's a pretty non-trivial amount of expense to setup a network with enough capacity to support a machine like this fi you want to do it yourself.
- mmt 8y ago> That implies a 40gb NIC It may imply that but only outright requires 40Gb/s total, which is provided by the "4-port 10GBase-T Ethernet SIOM (Intel® X550 controller)" of a SuperServer 7089P-TR4T. The EBS bandwidth can be elided entirely by using local storage instead. Local storage bandwidth can be much cheaper than ethernet, especially considering how many NVMe ports are already included. As 10GE is maybe $200/port (including SFPs), at scale, network cost doesn't "move the needle" on a $400k server.