As far as I understand, the hardware description of the server
I. Description of computer hardware type
.1 Types of computers
Desktop Laptop Server
·2 Server classification: Appearance classification
rack server
Blade server cost-effective space issues
Tower Server Home Use
· 3 Server classification: size classification
1U servers
2U server
4U server
1U server indicates that the server height is 4.45cm
· 4 Server classification: Performance classification
PC Server x86 Architecture
Minicomputer Server IBM HP
Mainframe Server Cabinet Petroleum (Address Exploration) Meteorological Bureau (Meteorological Data Processing)
.5 Service hardware components
CPU [Calculation processing][Send control command]
fan
Memory [Temporarily store data information]
Hard disk [permanent storage of data information]
Motherboard [Summarize and integrate all hardware]
power supply
Network card [realize data transmission]
array card
remote management card
#Details:
Array card: 1. Multiple hard disks can be consolidated into one hard disk (increase disk capacity)
2. Increased disk performance
3. Improve disk security
Consolidating disks with array cards: process of raiding arrays
Configure different raid levels:
Raid0: Advantages: Improved storage efficiency, disadvantages: Data storage security is not high. Companies will not use raid0
set
raid1: Advantages: high data storage security, disadvantages: low data storage efficiency
Raid5: Advantages: high storage efficiency, high security,(only one bad hard disk)
Disadvantages: Disk capacity will not waste a disk capacity
Remote Management Card: Controls service operation in server shutdown state Remote Network Installation System
CPU: performs arithmetic processing and arithmetic control
1. What is CPU way server CPU way
2. What is CPU Core Number Server CPU Core Number
Core processing server tasks ~ parallel processing task capabilities
Memory:
User Store Data--CPU--Store Data Instructions--Hard Disk (Mechanical)(Solid State)
Program: information about code written by developers
Process: A program that runs.
Daemons: Once up and running, they can't stop.
Buffer: buffer (write buffer)
Passenger (data)--queuing space--memory (buffer)--subway space (hard disk storage)
cache:cache (read cache)(stores hot data)
Customer--pour water--water bar to make drinks
Hard disk: permanent storage of data ~ to ensure that data is not lost
Hard disk interface type: IDE--sate--scsi--SAS (server hard disk mainstream interface)--PCI-E (server solid state hard disk interface)
Hard disk speed information: Home computer: 5400~7200
Enterprise servers: 10k ~ 15k,
Hard disk storage capacity: Storage unit:
1024Byth ==1KB 1024KB==1MB 1024MB==1GB
1024GB==1TB 1024TB==1PB 1024PB==1EB
1024EB==1ZB
Power supply: power supply capacity
The server power supply must have redundancy:
There will be multiple power supplies on the server 2. UPS (10-60 minutes) 3. Generator
Cabinet: The cables of server chain in cabinet shall be marked.
Server cable arrangement in cabinet
Hardware performance comparison:
CPU--Memory--Network card--Hard disk (solid state)--Hard disk (mechanical)
How companies store data:
Large enterprise; high concurrency (data read and write efficiency)
User Data-Write-Save to Memory (Buffer)-Timed Quantitative-Store to Hard Disk
User Data-Read-Read from Memory (Buffer)-Hotspot Data-Store to Hard Disk
Small and medium-sized enterprises: low concurrency (data security)
User Data-Write-Store to Hard Disk
User Data-Read-Read from Memory (Buffer)-Hotspot Data-Store to Hard
