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mirror of https://github.com/Snailclimb/JavaGuide synced 2025-06-16 18:10:13 +08:00

[docs improve]cdn和读写分离&分库分表部分图片重新绘制

This commit is contained in:
guide 2022-08-21 19:25:25 +08:00
parent 29741e6bca
commit 26e92a4e79
6 changed files with 4 additions and 7 deletions

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@ -73,8 +73,6 @@ CDN 会通过 GSLB 找到最合适的 CDN 节点,更具体点来说是下面
![CDN 原理示意图](https://guide-blog-images.oss-cn-shenzhen.aliyuncs.com/github/javaguide/high-performance/cdn/cdn-overview.png) ![CDN 原理示意图](https://guide-blog-images.oss-cn-shenzhen.aliyuncs.com/github/javaguide/high-performance/cdn/cdn-overview.png)
为了方便理解上图其实做了一点简化。GSLB 内部可以看作是 CDN 专用 DNS 服务器和负载均衡系统组合。CDN 专用 DNS 服务器会返回负载均衡系统 IP 地址给浏览器,浏览器使用 IP 地址请求负载均衡系统进而找到对应的 CDN 节点。 为了方便理解上图其实做了一点简化。GSLB 内部可以看作是 CDN 专用 DNS 服务器和负载均衡系统组合。CDN 专用 DNS 服务器会返回负载均衡系统 IP 地址给浏览器,浏览器使用 IP 地址请求负载均衡系统进而找到对应的 CDN 节点。
**GSLB 是如何选择出最合适的 CDN 节点呢?** GSLB 会根据请求的 IP 地址、CDN 节点状态(比如负载情况、性能、响应时间、带宽)等指标来综合判断具体返回哪一个 CDN 节点的地址。 **GSLB 是如何选择出最合适的 CDN 节点呢?** GSLB 会根据请求的 IP 地址、CDN 节点状态(比如负载情况、性能、响应时间、带宽)等指标来综合判断具体返回哪一个 CDN 节点的地址。

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@ -201,4 +201,3 @@ ShardingSphere 绝对可以说是当前分库分表的首选ShardingSphere
- 引入分库分表之后,需要系统解决事务、分布式 id、无法 join 操作问题。 - 引入分库分表之后,需要系统解决事务、分布式 id、无法 join 操作问题。
- ShardingSphere 绝对可以说是当前分库分表的首选ShardingSphere 的功能完善除了支持读写分离和分库分表还提供分布式事务、数据库治理等功能。另外ShardingSphere 的生态体系完善,社区活跃,文档完善,更新和发布比较频繁。 - ShardingSphere 绝对可以说是当前分库分表的首选ShardingSphere 的功能完善除了支持读写分离和分库分表还提供分布式事务、数据库治理等功能。另外ShardingSphere 的生态体系完善,社区活跃,文档完善,更新和发布比较频繁。