Course description hardware knowledge

1. Classification System Hardware Description
   * classified by the use of hardware
   household hardware devices: desktop notebook
   enterprise hardware devices: device server

   · Classified according to hardware performance
   rack server: Internet environment (dell IBM Lenovo HP Huawei wave)
   ordinary rack server (tens of thousands to 100,000 +)
   minicomputer server (hundreds of thousands to 1,000,000 +)
   mainframe servers (one hundred million to several million +)
   blade server: physical space constraints performance requirements for
   tower servers: a home server device

   · Appearance classified in hardware
   1U servers: U = 4.45 cm server thickness 1U
   2U servers:
   4U server:

   Virtual Cloud Host: Ali Cloud (lease) https://www.aliyun.com/

   2) System hardware part
   1) CPU (Central Processing Unit) brain arithmetic / control
   2) a hard disk can store data (persistent storage)
   3) multiple devices can be cascaded Board
   4) can store the data memory (temporary storage)
   5) power supply powering the device
   6) cooling fans
   and other host communication 7) card for device
   8) optical drives to the system
   9) array card integrated into a multiple hard disk
   10) remote management card remote boot / installation system remotely

   Is not it amazing feeling, really want to test the waters