Why Cisco UCS Rocks #5: Scalability
- The previous server’s service profile need only be instantiated on a new server . . . [it's a] new version of the scale-up concept—easily move to a new bigger server. The new server appears to both the OS and hypervisor exactly as the older server, except more resources are available.
— New Cisco UCS Servers: Redefining Scale Up, Scale Up and Scale Out
“By moving applications running on non-mission-critical servers in other departments, roughly 50–75 servers located around campus, we will save the significant expense of the energy costs and physical space currently used,” says Rose. “We will also be able to provide redundancy, which these servers never had.”
— Tony Rose, Assistant Director for Systems Administration, Elon University
A fully-populated UCS chassis with eight half-slot UCS blades and with 96 GB of memory can run up to 1,280 desktops (160 desktops per blade). Furthermore, the utilization rates seen on the system back plane clearly showed that the linear scaling
seen on a single chassis can be extended to include multiple chassis. Given the fact that UCS scales to 40 chassis or 320 UCS blade servers with a Nexus 6140 XP fabric interconnect, we clearly see a linear scalability of desktops with a large multi-chassis configuration. — Cisco UCS Scalability Study on VMware View
If you want a highly scalable computing system, then you want Cisco UCS.