One. Computer hardware Type Description
.1 type of the computer
desktop notebook server
1.2 Server Category: Appearance Classification
rack server
blade server space issues cost-effective
tower server for home use
2.3 Server Category: Size classification
1U server
2U server
4U server
1U server means that the server height is 4.45 cm
· 4 server Category: performance Categories
PC x86 architecture server
minicomputer server IBM HP
mainframe server cabinet petroleum (exploration and address) Bureau of Meteorology (weather data operation)
.5 service hardware components of
CPU processing [operation] [transmission control instruction]
fan
memory [temporarily storing data]
hard [permanently store data information]
Board [summary integrate all hardware]
power
NIC [data transmission]
array card
remote management card
# Description:
array card: 1 may be multiple disks integrated as a hard disk (disk capacity increases)
2. to increase the performance of disk
3. to improve security of disk
using a disk array card integration: configure the array (raid) procedure
to configure different levels raid:
Raid0: advantages: to improve the storage efficiency disadvantages: data storage security is not high. Enterprises will not adopt raid0 feature
set
raid1: advantages: high security data storage, Cons: data storage efficiency is not high
raid5: advantages: high storage efficiency, high safety surname, (only bad hard disk)
Disadvantages: a waste of disk capacity on disk capacity
远程管理卡：在服务器关机状态控制服务运行
远程网络安装系统CPU: perform arithmetic calculation control processing
1. What are the large ones CPU server CPU large ones
2. What is the number of server CPU core CPU cores
core processing server tasks - task parallel processing capability
Memory:
User data storage for storing data --CPU-- instructions - hard disk (mechanical) (solid)
program: developers write good code information
process: running the program
daemons: Once up and running simply can not stop
buffer: buffer (write buffer)
passengers (data) - queuing space - memory (buffer) - Underground space (hard disk storage)
cache: cache (read cache) (store hot data)
customers - pour - do drink water it
hard : permanently store data ~ ensure against data loss
hard drive interface type: IDE - sate - scsi - SAS ( server Interface main hard disk) - PCI-E (SSD server Interface)
hard disk rotational speed information: a home computer: 5400 ~ 7200
enterprise server: 10k ~ 15k,
hard disk storage capacity: the storage unit:
1024Byth (bytes) 1MB 1024MB == == == 1KB 1024KB 1GB
1024GB 1TB 1024TB == == == 1PB 1024PB 1EB
1024EB == 1ZB
power: power supply capacity
redundant server power should have:
- 2. Power on the server have a plurality of uninterruptible power supply UPS (10-60 minutes) 3. generator
enclosure: a cable rack server chains, must be labeled
cabinet cable finishing server
Hardware performance comparison:
CPU - memory - card - Hard (Solid State) - Hard disk (mechanical)
Enterprise how to store data:
large enterprises; concurrency than the larger (read and write data efficiency)
user data - write - saved to memory (buffer) - time quantitative - stored in the hard disk
user data - read - reading (buffer) from memory - hot data - stored in the hard disk
SME: relatively small amount of concurrency (security data)
of user data - write - storage hard to
user data - read - reading (buffer) from memory - hot data - stored in the hard