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

1. The origin and overview of cloud storage

Cloud storage is a new technology developed when cloud computing develops to a certain stage.

1.1 Cloud Computing

Pay-per-use model

Network access

1.2 Cloud Stora

Pay-per-use model

Network access-emerging network storage technology (cluster application, network technology, distributed file system, etc.)

Different types of storage devices work together through application software to provide data storage and business access.

2. Common storage types 2.1 blocks of storage 2.1.1 typical devices

DAS storage

Disk array storage (SAN)

2.1.2 benefits

Technical means: RAID, LVM

Capacity: direct combination of multiple disks

IO operation: SAN storage, parallel writing of multiple disks to improve read and write speed

2.1.3 shortcomings

Cost: disk array, need to buy fiber switch, fiber card

Storage system: it is difficult to share data between Stora

Operating system: it is difficult to share data between different operating systems

2.2 File Storage 2.2.1 typical Devic

FTP, NFS storage service

NAS storage

2.2.2 benefits

Low cost

Data sharing: convenient file sharing between different clients and servers

2.2.3 shortcomings

Low reading and writing rate

Limited network bandwidth

2.3 object Storage (important) 2.3.1 typical equipment

Distributed server with large capacity hard disk

2.3.2 Features

It has the characteristics of SAN high-speed access to disk.

With the distributed sharing characteristics of NAS

3. Basic characteristics of cloud storage 3.1 structure

Distributed parallel extension architecture

3.2 Total cost

Low performance-to-price ratio

Pay by quantity

Reduce the cost of operation and maintenance

3.3 capacity

Elastic expansion (can be increased or decreased), unlimited capacity expansion

3.4 data storage

Redundancy, fault tolerance

3.5 Security

Data security encryption

3.6 Resource sharing

Not limited to the number of hardware storage nodes, unified data management and sharing

POSIX traditional file access

API interface access

4. Cloud storage and traditional storage 4.1 functional requirements

Traditional storage: high performance computing, transaction processing (database applications, etc.)

Cloud storage: various types of online storage services (web, cloud disk, etc.)

4.2 capacity expansion

Traditional storage: high technical difficulty and high cost

Cloud storage: unlimited capacity, elastic expansion, linear performance

4.3 performance requirements

Traditional storage: concurrent read and write is limited by the read and write ability of a single device-the central node

Cloud storage: control system is separated from data, throughput capacity is affected by network bandwidth, concurrent read and write multiple storage nodes, hot data load balancing-no central node

4.4 data sharing

Traditional storage: unable to aggregate and share capacity and bandwidth between multiple devices

Cloud storage: cluster file system, flexible data sharing

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