A CDE Definition
A PC architecture that houses multiple PC modules ("blades") in a single chassis. It takes the machines off the users' desks and houses them in rack mounted cabinets in the datacenter similar to blade servers (see blade server). The user's keyboard, monitor and mouse plug into a device at the desk that is wired via a TCP/IP or direct connection to the assigned blade in the datacenter.
More Security and Flexibility
Having the physical PCs in the datacenter reduces noise and heat at users' desks and takes advantage of the inherent security in a locked room. PCs cannot be pilfered from cubicles, and data cannot be uploaded or downloaded because there is no access to USB ports and drives.
Instead of a hardware relocation, moving a user to a new station requires only an adjustment to the management software. If a PC fails, a spare blade may be available in each chassis for hot swapping, which is also a software function. In addition, repairs are always performed in the same place, and technicians do not have to travel throughout the building.
Eight Blade PCs
A server architecture that houses multiple server modules ("blades") in a single chassis. It is widely used in datacenters to save space and improve system management. Either self-standing or rack mounted, the chassis provides the power supply, and each blade has its own CPU, RAM and storage. Redundant power supplies may be an option. Blade servers generally provide their own management systems and may include a network or storage switch. Contrast with blade PC.
With enterprise-class blade servers, storage may be external, and the blades are diskless. This approach allows for more efficient failover because applications are not tied to specific hardware and a particular instance of the operating system. The blades are anonymous and interchangeable. In a hyperconverged datacenter architecture, the blade servers each have local storage (see hyperconverged infrastructure). See blade and processor area network.
Enterprise-Class Blade Server
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