28 lines
993 B
Markdown
28 lines
993 B
Markdown
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---
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layout: pattern
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title: Caching
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folder: caching
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permalink: /patterns/caching/
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categories: Behavioral
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tags:
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- Performance
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- Cloud distributed
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---
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## 目的
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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。
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## 类图
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## 适用性
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在以下情况下使用缓存模式
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* 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。
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## 鸣谢
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* [Write-through, write-around, write-back: Cache explained](http://www.computerweekly.com/feature/Write-through-write-around-write-back-Cache-explained)
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* [Read-Through, Write-Through, Write-Behind, and Refresh-Ahead Caching](https://docs.oracle.com/cd/E15357_01/coh.360/e15723/cache_rtwtwbra.htm#COHDG5177)
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* [Cache-Aside pattern](https://docs.microsoft.com/en-us/azure/architecture/patterns/cache-aside)
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