Akamai CDN

Akamai CDN中的几个重要组件

mapping system 调度系统(映射client到edge cluster，进而到edge server)

edge server platform 边缘服务器系统

transport system 分层(tired)回源系统

communications and control system 通信与控制系统(收集状态信息，下发控制消息，配置更新等等)

data collection and analysis system 数据收集和分析系统(server log，client log， network and server information),又名Query系统

management portal 管理portal(配置更新，业务指标展示)

辅助系统和服务

DNS

Monitoring Agents

Global Traffic Manager

Storage

Client Slide Delivery (p2p)

下面对各分系统做进一步说明：

mapping system:

scoring part, collecting and processing historic and real-time data---including

real-time mapping part, two main steps:

map to cluster

map to server

 

Edge Server Platform(metadata configuration)

origin server location

cache control

cache indexing

Access control

Response to origin server failure

Header alteration

EdgeComputing

Performance optimization

 

Communications and Control System包括:

real-time distribution of status and control information

point-to-point RPC and Web Services

Dynamic configuration updates

key management infrastructure

software and machine configuration management

 

Data Collection and Analysis System包括：

Log collection

Real-time data collection and monitering

Analytics and Reporting

 

参考文献

[1].the-akamai-network-a-platform-for-high-performance-internet-applications-technical-publication.pdf