2021-02-08 23:37:48 +08:00
|
|
|
---
|
|
|
|
|
layout: pattern
|
|
|
|
|
title: Caching
|
|
|
|
|
folder: caching
|
2021-08-01 22:55:54 +08:00
|
|
|
permalink: /patterns/caching/
|
2021-02-08 23:37:48 +08:00
|
|
|
categories: Behavioral
|
2021-05-19 10:49:05 -06:00
|
|
|
language: zh
|
2021-02-08 23:37:48 +08:00
|
|
|
tags:
|
|
|
|
|
- Performance
|
|
|
|
|
- Cloud distributed
|
|
|
|
|
---
|
|
|
|
|
|
|
|
|
|
## 目的
|
|
|
|
|
为了避免昂贵的资源重新获取，方法是在资源使用后不立即释放资源。资源保留其身份，保留在某些快速访问的存储中，并被重新使用，以避免再次获取它们。
|
|
|
|
|
|
|
|
|
|
## 类图
|
2021-08-01 22:55:54 +08:00
|
|
|
|
2021-02-08 23:37:48 +08:00
|
|
|
|
|
|
|
|
## 适用性
|
|
|
|
|
在以下情况下使用缓存模式
|
|
|
|
|
|
|
|
|
|
* 重复获取，初始化和释放同一资源会导致不必要的性能开销。
|
|
|
|
|
|
|
|
|
|
## 鸣谢
|
|
|
|
|
|
|
|
|
|
* [Write-through, write-around, write-back: Cache explained](http://www.computerweekly.com/feature/Write-through-write-around-write-back-Cache-explained)
|
|
|
|
|
* [Read-Through, Write-Through, Write-Behind, and Refresh-Ahead Caching](https://docs.oracle.com/cd/E15357_01/coh.360/e15723/cache_rtwtwbra.htm#COHDG5177)
|
|
|
|
|
* [Cache-Aside pattern](https://docs.microsoft.com/en-us/azure/architecture/patterns/cache-aside)
|
