Table of Contents
电子商务网站比较常用的缓存策略架构,电子商务网站架构
缓存的原理
缓存分类
缓存媒介
缓存设计
 
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电子商务网站比较常用的缓存策略架构,电子商务网站架构

Jul 06, 2016 pm 02:25 PM
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电子商务网站比较常用的缓存策略架构,电子商务网站架构

缓存是分布式系统中的重要组件,主要解决高并发,大数据场景下,热点数据访问的性能问题。提供高性能的数据快速访问。

这次主要是分享下自己觉得比较通用的一个缓存策略的架构方案,也是比较 容易理解的.欢迎吐槽.

有更牛逼的也欢迎大家说下:

缓存是分布式系统中的重要组件,主要解决高并发,大数据场景下,热点数据访问的性能问题。提供高性能的数据快速访问。

缓存的原理

(1)       将数据写入/读取速度更快的存储(设备);

(2)       将数据缓存到离应用最近的位置;

(3)       将数据缓存到离用户最近的位置。

缓存分类

在分布式系统中,缓存的应用非常广泛,从部署角度有以下几个方面的缓存应用。

(1)       CDN缓存;

(2)       反向代理缓存;

(3)       分布式Cache;

(4)       本地应用缓存;

缓存媒介

常用中间件:Varnish,Ngnix,Squid,Memcache,Redis,Ehcache等;

缓存的内容:文件,数据,对象;

缓存的介质:CPU,内存(本地,分布式),磁盘(本地,分布式)

缓存设计

缓存设计需要解决以下几个问题:

(1)       缓存什么?

哪些数据需要缓存:1.热点数据;2.静态资源;

(2)       缓存的位置?

CDN,反向代理,分布式缓存服务器,本机(内存,硬盘)

(3)       如何缓存的问题?

  • 过期策略

1.固定时间:比如指定缓存的时间是30分钟;

2.相对时间:比如最近10分钟内没有访问的数据;

  • 同步机制

 

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