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这是一个基于 Java 、 由 Netty 负责传输 、默认使用 Protostuff 负责编解码的简单的RPC(远程过程调用)工具。
服务提供者将服务发布注册到 注册中心 ZooKeeper 上后，服务消费者请求 注册中心 ZooKeeper 查找订阅服务后与服务提供者通信调用服务( 支持 同步服
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编码结构TLV 格式是我们比较熟悉的编码格式。
所谓的 TLV 即 Tag - Length - Value。Tag 作为该字段的唯一标识，Length 代表 Value 数据域的长度，最后的 Value 并是数据本身。
ProtoBuf 编码采用类似的结构，但是实际上又有较大区别，其编码结构可见下
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网站和app并发性能取决于访问链路的每个环节，包括前端、流量路由、后台业务逻辑代码、中间件和数据库等。大部分环节都可以通过横向扩展来提高并发性能，数据库作为链路的末端要保持数据一致性等特点不像其他环节容易横向扩展，所以数据库性能尤为重要，特别是插入性能。
数据库设计通常会用一列与业务无关的自增长id
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ZGC is a new garbage collector recently open-sourced by Oracle for the OpenJDK. It was mainly written by Per Liden. ZGC is similar to Shenandoah or Az
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