That gives us 3 Nodes with (192GB of Ram, 2x Hex core Xeons) and we have 7TB of Primary Storage w/ 12TB of secondary Storage. Due to the age the storage is all hard disk, but if we were to buy today it would be SSD Cached or even pure SSD for primary storage. VMWare manages the cluster and we currently have ~ 50 vm guests.
As we have our own IP space, we have over 1500 IP address available.
Connectivity is slow as it is hosted in Brisbane, Australia, but we get 500Mbit of connectivity which we can saturate easily without taxing the hardware. Cost and business need is the only things keeping this from being higher.
Web activity is typically either highly dynamic but low frequency (custom web apps) or static, but high volume (image hosting for marketing emails). Since the payloads are high compared to most pages / APIs I really don't have numbers to compare as far as requests/second. We also tend to not be running the latest in the web stack, simply to keep maintenance down (we tend to use what ships with the base OS (Centos 7) and then add one or two packages if needed (PHP7)).
* ~1k request/second
* 8 + 8 + 2 = 18GB RAM
Tips: Use cheap hosting and build HA into it, server die all the time.
On this instance I have 24 WordPress based websites, all for small businesses, so no major traffic hogs (I've not exceeded 1TB of traffic per month in 3 years) but I've set them all a 2GB storage limit. I've not yet exceeded 1TB of Magnetic storage.
No email being hosted on the server.
I spread the sites out over 5 IP addresses.
I've got it storing snapshots of the whole thing to a storage bucket too.
On average it's costing me just over $330 per month.
I upgraded to the m3.xlarge instance last year as previous, less powerful instances didn't have the juice to put up with some of the shocking WP plugins/themes that get put on it.
To be honest, Zoho's service is pretty fantastic for free email.
[1] http://amagiccarwashforsale.com/ (if it's hugged to death let me know
AWS and Softlayer