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
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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