Shulou(Shulou.com)06/02 Report--

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

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