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- 非阻塞模式下 send 和 recv 函数的返回值
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="2.1.7" data-path="../网络编程/服务器开发通信协议设计介绍.html">
-
- <a href="../网络编程/服务器开发通信协议设计介绍.html">
-
-
- 服务器开发通信协议设计介绍
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="2.1.8" data-path="../网络编程/TCP协议如何解决粘包、半包问题.html">
-
- <a href="../网络编程/TCP协议如何解决粘包、半包问题.html">
-
-
- TCP 协议如何解决粘包、半包问题
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="2.1.9" data-path="../网络编程/网络通信中收发数据的正确姿势.html">
-
- <a href="../网络编程/网络通信中收发数据的正确姿势.html">
-
-
- 网络通信中收发数据的正确姿势
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="2.1.10" data-path="../网络编程/服务器端发数据时,如果对端一直不收,怎么办?.html">
-
- <a href="../网络编程/服务器端发数据时,如果对端一直不收,怎么办?.html">
-
-
- 服务器端发数据时,如果对端一直不收,怎么办?
-
- </a>
-
-
- </li>
-
- </ul>
-
- </li>
-
-
-
- <li class="divider"></li>
-
-
-
- <li class="chapter " data-level="3.1" data-path="../程序员必知必会的网络命令/">
-
- <a href="../程序员必知必会的网络命令/">
-
-
- 程序员必知必会的网络命令
-
- </a>
-
-
- <ul class="articles">
-
-
- <li class="chapter " data-level="3.1.1" data-path="../程序员必知必会的网络命令/利用telnet命令发电子邮件.html">
-
- <a href="../程序员必知必会的网络命令/利用telnet命令发电子邮件.html">
-
-
- 利用telnet命令发电子邮件
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="3.1.2" data-path="../程序员必知必会的网络命令/做Java或者C++开发都应该知道的lsof命令.html">
-
- <a href="../程序员必知必会的网络命令/做Java或者C++开发都应该知道的lsof命令.html">
-
-
- 做Java或者C++开发都应该知道的lsof命令
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="3.1.3" data-path="../程序员必知必会的网络命令/Linux网络故障排查的瑞士军刀.html">
-
- <a href="../程序员必知必会的网络命令/Linux网络故障排查的瑞士军刀.html">
-
-
- Linux网络故障排查的瑞士军刀nc命令
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="3.1.4" data-path="../程序员必知必会的网络命令/Linuxtcpdump使用介绍.html">
-
- <a href="../程序员必知必会的网络命令/Linuxtcpdump使用介绍.html">
-
-
- Linux tcpdump使用详解
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="3.1.5" data-path="../程序员必知必会的网络命令/从抓包的角度分析connect函数的连接过程.html">
-
- <a href="../程序员必知必会的网络命令/从抓包的角度分析connect函数的连接过程.html">
-
-
- 从抓包的角度分析connect函数的连接过程
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="3.1.6" data-path="../程序员必知必会的网络命令/服务器开发中网络数据分析与故障排查经验漫谈.html">
-
- <a href="../程序员必知必会的网络命令/服务器开发中网络数据分析与故障排查经验漫谈.html">
-
-
- 服务器开发中网络数据分析与故障排查经验漫谈
-
- </a>
-
-
- </li>
-
- </ul>
-
- </li>
-
-
-
- <li class="header">Part II</li>
-
-
-
- <li class="chapter " data-level="4.1" data-path="../高性能服务器框架设计/">
-
- <a href="../高性能服务器框架设计/">
-
-
- 高性能服务器框架设计
-
- </a>
-
-
- <ul class="articles">
-
-
- <li class="chapter " data-level="4.1.1" data-path="../高性能服务器框架设计/主线程与工作线程的分工.html">
-
- <a href="../高性能服务器框架设计/主线程与工作线程的分工.html">
-
-
- 主线程与工作线程的分工
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="4.1.2" data-path="../高性能服务器框架设计/Reactor模式.html">
-
- <a href="../高性能服务器框架设计/Reactor模式.html">
-
-
- Reactor模式
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="4.1.3" data-path="../高性能服务器框架设计/实例:一个服务器程序的架构介绍.html">
-
- <a href="../高性能服务器框架设计/实例:一个服务器程序的架构介绍.html">
-
-
- 实例:一个服务器程序的架构介绍
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="4.1.4" data-path="../高性能服务器框架设计/错误码系统的设计.html">
-
- <a href="../高性能服务器框架设计/错误码系统的设计.html">
-
-
- 错误码系统的设计
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="4.1.5" data-path="../高性能服务器框架设计/日志系统的设计.html">
-
- <a href="../高性能服务器框架设计/日志系统的设计.html">
-
-
- 日志系统的设计
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="4.1.6" data-path="../高性能服务器框架设计/如何设计断线自动重连机制.html">
-
- <a href="../高性能服务器框架设计/如何设计断线自动重连机制.html">
-
-
- 如何设计断线自动重连机制
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="4.1.7" data-path="../高性能服务器框架设计/心跳包机制设计详解.html">
-
- <a href="../高性能服务器框架设计/心跳包机制设计详解.html">
-
-
- 心跳包机制设计详解
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="4.1.8" data-path="../高性能服务器框架设计/业务数据处理一定要单独开线程吗.html">
-
- <a href="../高性能服务器框架设计/业务数据处理一定要单独开线程吗.html">
-
-
- 业务数据处理一定要单独开线程吗
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="4.1.9" data-path="../高性能服务器框架设计/C++高性能服务器网络框架设计细节.html">
-
- <a href="../高性能服务器框架设计/C++高性能服务器网络框架设计细节.html">
-
-
- C++ 高性能服务器网络框架设计细节
-
- </a>
-
-
- </li>
-
- </ul>
-
- </li>
-
-
-
- <li class="divider"></li>
-
-
-
- <li class="chapter " data-level="5.1" data-path="../服务器开发案例实战/">
-
- <a href="../服务器开发案例实战/">
-
-
- 服务器开发案例实战
-
- </a>
-
-
- <ul class="articles">
-
-
- <li class="chapter " data-level="5.1.1" data-path="../服务器开发案例实战/从零实现一个http服务器.html">
-
- <a href="../服务器开发案例实战/从零实现一个http服务器.html">
-
-
- 从零实现一个http服务器
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="5.1.2" data-path="../服务器开发案例实战/从零实现一款12306刷票软件.html">
-
- <a href="../服务器开发案例实战/从零实现一款12306刷票软件.html">
-
-
- 从零实现一款12306刷票软件
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="5.1.3" data-path="../服务器开发案例实战/从零实现一个邮件收发客户端.html">
-
- <a href="../服务器开发案例实战/从零实现一个邮件收发客户端.html">
-
-
- 从零实现一个邮件收发客户端
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="5.1.4" data-path="../服务器开发案例实战/从零开发一个WebSocket服务器.html">
-
- <a href="../服务器开发案例实战/从零开发一个WebSocket服务器.html">
-
-
- 从零开发一个WebSocket服务器
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="5.1.5" data-path="../服务器开发案例实战/1从一款多人联机实时对战游戏开始.html">
-
- <a href="../服务器开发案例实战/1从一款多人联机实时对战游戏开始.html">
-
-
- 从零学习开源项目系列(一) 从一款多人联机实时对战游戏开始
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="5.1.6" data-path="../服务器开发案例实战/2最后一战概况.html">
-
- <a href="../服务器开发案例实战/2最后一战概况.html">
-
-
- 从零学习开源项目系列(二) 最后一战概况
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="5.1.7" data-path="../服务器开发案例实战/3CSBattleMgr服务源码研究.html">
-
- <a href="../服务器开发案例实战/3CSBattleMgr服务源码研究.html">
-
-
- 从零学习开源项目系列(三) CSBattleMgr服务源码研究
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="5.1.8" data-path="../服务器开发案例实战/4LogServer源码探究.html">
-
- <a href="../服务器开发案例实战/4LogServer源码探究.html">
-
-
- 从零学习开源项目系列(四)LogServer源码探究
-
- </a>
-
-
- </li>
-
- </ul>
-
- </li>
-
-
-
- <li class="header">Part III</li>
-
-
-
- <li class="chapter " data-level="6.1" data-path="../TeamTalk源码解析/">
-
- <a href="../TeamTalk源码解析/">
-
-
- TeamTalk IM源码分析
-
- </a>
-
-
- <ul class="articles">
-
-
- <li class="chapter " data-level="6.1.1" data-path="../TeamTalk源码解析/01TeamTalk介绍.html">
-
- <a href="../TeamTalk源码解析/01TeamTalk介绍.html">
-
-
- 01 TeamTalk介绍
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.2" data-path="../TeamTalk源码解析/02服务器端的程序的编译与部署.html">
-
- <a href="../TeamTalk源码解析/02服务器端的程序的编译与部署.html">
-
-
- 02 服务器端的程序的编译与部署
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.3" data-path="../TeamTalk源码解析/03服务器端的程序架构介绍.html">
-
- <a href="../TeamTalk源码解析/03服务器端的程序架构介绍.html">
-
-
- 03 服务器端的程序架构介绍
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.4" data-path="../TeamTalk源码解析/04服务器端db_proxy_server源码分析.html">
-
- <a href="../TeamTalk源码解析/04服务器端db_proxy_server源码分析.html">
-
-
- 04 服务器端db_proxy_server源码分析
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.5" data-path="../TeamTalk源码解析/05服务器端msg_server源码分析.html">
-
- <a href="../TeamTalk源码解析/05服务器端msg_server源码分析.html">
-
-
- 05 服务器端msg_server源码分析
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.6" data-path="../TeamTalk源码解析/06服务器端login_server源码分析.html">
-
- <a href="../TeamTalk源码解析/06服务器端login_server源码分析.html">
-
-
- 06 服务器端login_server源码分析
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.7" data-path="../TeamTalk源码解析/07服务器端msfs源码分析.html">
-
- <a href="../TeamTalk源码解析/07服务器端msfs源码分析.html">
-
-
- 07 服务器端msfs源码分析
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.8" data-path="../TeamTalk源码解析/08服务器端file_server源码分析.html">
-
- <a href="../TeamTalk源码解析/08服务器端file_server源码分析.html">
-
-
- 08 服务器端file_server源码分析
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.9" data-path="../TeamTalk源码解析/09服务器端route_server源码分析.html">
-
- <a href="../TeamTalk源码解析/09服务器端route_server源码分析.html">
-
-
- 09 服务器端route_server源码分析
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.10" data-path="../TeamTalk源码解析/10开放一个TeamTalk测试服务器地址和几个测试账号.html">
-
- <a href="../TeamTalk源码解析/10开放一个TeamTalk测试服务器地址和几个测试账号.html">
-
-
- 10 开放一个TeamTalk测试服务器地址和几个测试账号
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="6.1.11" data-path="../TeamTalk源码解析/11pc客户端源码分析.html">
-
- <a href="../TeamTalk源码解析/11pc客户端源码分析.html">
-
-
- 11 pc客户端源码分析
-
- </a>
-
-
- </li>
-
- </ul>
-
- </li>
-
-
-
- <li class="divider"></li>
-
-
-
- <li class="chapter " data-level="7.1" data-path="../libevent源码深度剖析/">
-
- <a href="../libevent源码深度剖析/">
-
-
- libevent源码深度剖析
-
- </a>
-
-
- <ul class="articles">
-
-
- <li class="chapter " data-level="7.1.1" data-path="../libevent源码深度剖析/libevent源码深度剖析01.html">
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- <a href="../libevent源码深度剖析/libevent源码深度剖析01.html">
-
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- libevent源码深度剖析01
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.2" data-path="../libevent源码深度剖析/libevent源码深度剖析02.html">
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- <a href="../libevent源码深度剖析/libevent源码深度剖析02.html">
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- libevent源码深度剖析02
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- </a>
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-
- </li>
-
- <li class="chapter " data-level="7.1.3" data-path="../libevent源码深度剖析/libevent源码深度剖析03.html">
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- <a href="../libevent源码深度剖析/libevent源码深度剖析03.html">
-
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- libevent源码深度剖析03
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- </a>
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-
- </li>
-
- <li class="chapter " data-level="7.1.4" data-path="../libevent源码深度剖析/libevent源码深度剖析04.html">
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- <a href="../libevent源码深度剖析/libevent源码深度剖析04.html">
-
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- libevent源码深度剖析04
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.5" data-path="../libevent源码深度剖析/libevent源码深度剖析05.html">
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- <a href="../libevent源码深度剖析/libevent源码深度剖析05.html">
-
-
- libevent源码深度剖析05
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.6" data-path="../libevent源码深度剖析/libevent源码深度剖析06.html">
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- <a href="../libevent源码深度剖析/libevent源码深度剖析06.html">
-
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- libevent源码深度剖析06
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- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.7" data-path="../libevent源码深度剖析/libevent源码深度剖析07.html">
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- <a href="../libevent源码深度剖析/libevent源码深度剖析07.html">
-
-
- libevent源码深度剖析07
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.8" data-path="../libevent源码深度剖析/libevent源码深度剖析08.html">
-
- <a href="../libevent源码深度剖析/libevent源码深度剖析08.html">
-
-
- libevent源码深度剖析08
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.9" data-path="../libevent源码深度剖析/libevent源码深度剖析09.html">
-
- <a href="../libevent源码深度剖析/libevent源码深度剖析09.html">
-
-
- libevent源码深度剖析09
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.10" data-path="../libevent源码深度剖析/libevent源码深度剖析10.html">
-
- <a href="../libevent源码深度剖析/libevent源码深度剖析10.html">
-
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- libevent源码深度剖析10
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.11" data-path="../libevent源码深度剖析/libevent源码深度剖析11.html">
-
- <a href="../libevent源码深度剖析/libevent源码深度剖析11.html">
-
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- libevent源码深度剖析11
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.12" data-path="../libevent源码深度剖析/libevent源码深度剖析12.html">
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- <a href="../libevent源码深度剖析/libevent源码深度剖析12.html">
-
-
- libevent源码深度剖析12
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.1.13" data-path="../libevent源码深度剖析/libevent源码深度剖析13.html">
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- <a href="../libevent源码深度剖析/libevent源码深度剖析13.html">
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- libevent源码深度剖析13
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- </a>
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- </li>
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- </ul>
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- </li>
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- <li class="chapter " data-level="7.2" data-path="./">
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- <a href="./">
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- leveldb源码分析
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- </a>
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- <ul class="articles">
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- leveldb源码分析1
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- leveldb源码分析2
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- </a>
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- <li class="chapter " data-level="7.2.3" data-path="leveldb源码分析3.html">
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- leveldb源码分析3
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- </a>
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- <li class="chapter " data-level="7.2.4" data-path="leveldb源码分析4.html">
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- leveldb源码分析4
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- </a>
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- <li class="chapter " data-level="7.2.5" data-path="leveldb源码分析5.html">
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- leveldb源码分析5
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- </a>
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- <li class="chapter " data-level="7.2.6" data-path="leveldb源码分析6.html">
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- leveldb源码分析6
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- <li class="chapter " data-level="7.2.7" data-path="leveldb源码分析7.html">
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- leveldb源码分析7
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- <li class="chapter " data-level="7.2.8" data-path="leveldb源码分析8.html">
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- leveldb源码分析8
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- <li class="chapter " data-level="7.2.9" data-path="leveldb源码分析9.html">
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- leveldb源码分析9
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- <li class="chapter " data-level="7.2.10" data-path="leveldb源码分析10.html">
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- leveldb源码分析10
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- <li class="chapter " data-level="7.2.11" data-path="leveldb源码分析11.html">
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- leveldb源码分析11
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- </a>
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- <li class="chapter " data-level="7.2.12" data-path="leveldb源码分析12.html">
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- leveldb源码分析12
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- </a>
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- <li class="chapter " data-level="7.2.13" data-path="leveldb源码分析13.html">
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- leveldb源码分析13
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- </a>
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- <li class="chapter " data-level="7.2.14" data-path="leveldb源码分析14.html">
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- leveldb源码分析14
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- </a>
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- </li>
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- <li class="chapter " data-level="7.2.15" data-path="leveldb源码分析15.html">
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- <a href="leveldb源码分析15.html">
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- leveldb源码分析15
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- </a>
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- </li>
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- <li class="chapter " data-level="7.2.16" data-path="leveldb源码分析16.html">
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- leveldb源码分析16
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- </a>
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-
- </li>
-
- <li class="chapter " data-level="7.2.17" data-path="leveldb源码分析17.html">
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- <a href="leveldb源码分析17.html">
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- leveldb源码分析17
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- </a>
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-
- </li>
-
- <li class="chapter " data-level="7.2.18" data-path="leveldb源码分析18.html">
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- <a href="leveldb源码分析18.html">
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-
- leveldb源码分析18
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- </a>
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-
- </li>
-
- <li class="chapter active" data-level="7.2.19" data-path="leveldb源码分析19.html">
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- <a href="leveldb源码分析19.html">
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-
- leveldb源码分析19
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- </a>
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-
- </li>
-
- <li class="chapter " data-level="7.2.20" data-path="leveldb源码分析20.html">
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- <a href="leveldb源码分析20.html">
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-
- leveldb源码分析20
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.2.21" data-path="leveldb源码分析21.html">
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- <a href="leveldb源码分析21.html">
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-
- leveldb源码分析21
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- </a>
-
-
- </li>
-
- <li class="chapter " data-level="7.2.22" data-path="leveldb源码分析22.html">
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- <a href="leveldb源码分析22.html">
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-
- leveldb源码分析22
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- </a>
-
-
- </li>
-
- </ul>
-
- </li>
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-
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- <li class="divider"></li>
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- <li class="chapter " data-level="8.1" data-path="../Memcached源码分析/">
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- <a href="../Memcached源码分析/">
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-
- Memcached源码分析
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- </a>
-
-
- <ul class="articles">
-
-
- <li class="chapter " data-level="8.1.1" data-path="../Memcached源码分析/00服务器资源调整.html">
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- <a href="../Memcached源码分析/00服务器资源调整.html">
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- 00 服务器资源调整
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- </a>
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-
- </li>
-
- <li class="chapter " data-level="8.1.2" data-path="../Memcached源码分析/01初始化参数解析.html">
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- <a href="../Memcached源码分析/01初始化参数解析.html">
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-
- 01 初始化参数解析
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- </a>
-
-
- </li>
-
- <li class="chapter " data-level="8.1.3" data-path="../Memcached源码分析/02网络监听的建立.html">
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- <a href="../Memcached源码分析/02网络监听的建立.html">
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-
- 02 网络监听的建立
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- </a>
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-
- </li>
-
- <li class="chapter " data-level="8.1.4" data-path="../Memcached源码分析/03网络连接建立.html">
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- <a href="../Memcached源码分析/03网络连接建立.html">
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-
- 03 网络连接建立
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- </a>
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-
- </li>
-
- <li class="chapter " data-level="8.1.5" data-path="../Memcached源码分析/04内存初始化.html">
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- <a href="../Memcached源码分析/04内存初始化.html">
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-
- 04 内存初始化
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- </a>
-
-
- </li>
-
- <li class="chapter " data-level="8.1.6" data-path="../Memcached源码分析/05资源初始化.html">
-
- <a href="../Memcached源码分析/05资源初始化.html">
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-
- 05 资源初始化
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="8.1.7" data-path="../Memcached源码分析/06get过程.html">
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- <a href="../Memcached源码分析/06get过程.html">
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-
- 06 get过程
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="8.1.8" data-path="../Memcached源码分析/07cas属性.html">
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- <a href="../Memcached源码分析/07cas属性.html">
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-
- 07 cas属性
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="8.1.9" data-path="../Memcached源码分析/08内存池.html">
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- <a href="../Memcached源码分析/08内存池.html">
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-
- 08 内存池
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="8.1.10" data-path="../Memcached源码分析/09连接队列.html">
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- <a href="../Memcached源码分析/09连接队列.html">
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-
- 09 连接队列
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="8.1.11" data-path="../Memcached源码分析/10Hash表操作.html">
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- <a href="../Memcached源码分析/10Hash表操作.html">
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-
- 10 Hash表操作
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="8.1.12" data-path="../Memcached源码分析/12set操作.html">
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- <a href="../Memcached源码分析/12set操作.html">
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-
- 12 set操作
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="8.1.13" data-path="../Memcached源码分析/13do_item_alloc操作.html">
-
- <a href="../Memcached源码分析/13do_item_alloc操作.html">
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-
- 13 do_item_alloc操作
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="8.1.14" data-path="../Memcached源码分析/14item结构.html">
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- <a href="../Memcached源码分析/14item结构.html">
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-
- 14 item结构
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="8.1.15" data-path="../Memcached源码分析/15Hash表扩容.html">
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- <a href="../Memcached源码分析/15Hash表扩容.html">
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-
- 15 Hash表扩容
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="8.1.16" data-path="../Memcached源码分析/16线程交互.html">
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- <a href="../Memcached源码分析/16线程交互.html">
-
-
- 16 线程交互
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="8.1.17" data-path="../Memcached源码分析/17状态机.html">
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- <a href="../Memcached源码分析/17状态机.html">
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-
- 17 状态机
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- </a>
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-
- </li>
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- </ul>
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- </li>
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- <li class="divider"></li>
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- <li class="chapter " data-level="9.1" data-path="../游戏开发专题/">
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- 游戏开发专题
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-
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- <ul class="articles">
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- <li class="chapter " data-level="9.1.1" data-path="../游戏开发专题/1游戏服务器开发的基本体系与服务器端开发的一些建议.html">
-
- <a href="../游戏开发专题/1游戏服务器开发的基本体系与服务器端开发的一些建议.html">
-
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- 1 游戏服务器开发的基本体系与服务器端开发的一些建议
-
- </a>
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-
- </li>
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- <li class="chapter " data-level="9.1.2" data-path="../游戏开发专题/2网络游戏服务器开发框架设计介绍.html">
-
- <a href="../游戏开发专题/2网络游戏服务器开发框架设计介绍.html">
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-
- 2 网络游戏服务器开发框架设计介绍
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="9.1.3" data-path="../游戏开发专题/3游戏后端开发需要掌握的知识.html">
-
- <a href="../游戏开发专题/3游戏后端开发需要掌握的知识.html">
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-
- 3 游戏后端开发需要掌握的知识
-
- </a>
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-
- </li>
-
- <li class="chapter " data-level="9.1.4" data-path="../游戏开发专题/4关于游戏服务端架构的整理.html">
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- <a href="../游戏开发专题/4关于游戏服务端架构的整理.html">
-
-
- 4 关于游戏服务端架构的整理
-
- </a>
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-
- </li>
-
- <li class="chapter " data-level="9.1.5" data-path="../游戏开发专题/5各类游戏对应的服务端架构.html">
-
- <a href="../游戏开发专题/5各类游戏对应的服务端架构.html">
-
-
- 5 各类游戏对应的服务端架构
-
- </a>
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-
- </li>
-
- <li class="chapter " data-level="9.1.6" data-path="../游戏开发专题/6从腾讯QQgame高性能服务器集群架构看“分而治之”与“自治”等分布式架构设计原则.html">
-
- <a href="../游戏开发专题/6从腾讯QQgame高性能服务器集群架构看“分而治之”与“自治”等分布式架构设计原则.html">
-
-
- 6 从腾讯QQgame高性能服务器集群架构看“分而治之”与“自治”等分布式架构设计原则
-
- </a>
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-
- </li>
-
- <li class="chapter " data-level="9.1.7" data-path="../游戏开发专题/7QQ游戏百万人同时在线服务器架构实现.html">
-
- <a href="../游戏开发专题/7QQ游戏百万人同时在线服务器架构实现.html">
-
-
- 7 QQ游戏百万人同时在线服务器架构实现
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="9.1.8" data-path="../游戏开发专题/8大型多人在线游戏服务器架构设计.html">
-
- <a href="../游戏开发专题/8大型多人在线游戏服务器架构设计.html">
-
-
- 8 大型多人在线游戏服务器架构设计
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="9.1.9" data-path="../游戏开发专题/9百万用户级游戏服务器架构设计.html">
-
- <a href="../游戏开发专题/9百万用户级游戏服务器架构设计.html">
-
-
- 9 百万用户级游戏服务器架构设计
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="9.1.10" data-path="../游戏开发专题/10十万在线的WebGame的数据库设计思路.html">
-
- <a href="../游戏开发专题/10十万在线的WebGame的数据库设计思路.html">
-
-
- 10 十万在线的WebGame的数据库设计思路
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="9.1.11" data-path="../游戏开发专题/11一种高性能网络游戏服务器架构设计.html">
-
- <a href="../游戏开发专题/11一种高性能网络游戏服务器架构设计.html">
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-
- 11 一种高性能网络游戏服务器架构设计
-
- </a>
-
-
- </li>
-
- <li class="chapter " data-level="9.1.12" data-path="../游戏开发专题/12经典游戏服务器端架构概述.html">
-
- <a href="../游戏开发专题/12经典游戏服务器端架构概述.html">
-
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- 12 经典游戏服务器端架构概述
-
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-
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-
- <li class="chapter " data-level="9.1.13" data-path="../游戏开发专题/13游戏跨服架构进化之路.html">
-
- <a href="../游戏开发专题/13游戏跨服架构进化之路.html">
-
-
- 13 游戏跨服架构进化之路
-
- </a>
-
-
- </li>
-
- </ul>
-
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-
-
-
- <li class="header">Part IV</li>
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-
- <li class="chapter " data-level="10.1" data-path="../程序员面试题精讲/">
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- <a href="../程序员面试题精讲/">
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- 程序员面试题精讲
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- <li class="chapter " data-level="10.1.1" data-path="../程序员面试题精讲/腾讯后台开发实习生技能要求.html">
-
- <a href="../程序员面试题精讲/腾讯后台开发实习生技能要求.html">
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- 腾讯后台开发实习生技能要求
-
- </a>
-
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- </li>
-
- <li class="chapter " data-level="10.1.2" data-path="../程序员面试题精讲/聊聊如何拿大厂的offer.html">
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- <a href="../程序员面试题精讲/聊聊如何拿大厂的offer.html">
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- 聊聊如何拿大厂的 offer
-
- </a>
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-
- </li>
-
- <li class="chapter " data-level="10.1.3" data-path="../程序员面试题精讲/网络通信题目集锦.html">
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- <a href="../程序员面试题精讲/网络通信题目集锦.html">
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- 网络通信题目集锦
-
- </a>
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-
- <li class="chapter " data-level="10.1.4" data-path="../程序员面试题精讲/我面试后端开发经理的经历.html">
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- <a href="../程序员面试题精讲/我面试后端开发经理的经历.html">
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- 我面试后端开发经理的经历
-
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-
- </li>
-
- <li class="chapter " data-level="10.1.5" data-path="../程序员面试题精讲/LinuxCC++后端开发面试问哪些问题.html">
-
- <a href="../程序员面试题精讲/LinuxCC++后端开发面试问哪些问题.html">
-
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- Linux C/C++后端开发面试问哪些问题
-
- </a>
-
-
- </li>
-
- </ul>
-
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-
- <li class="chapter " data-level="10.2" data-path="../职业规划/">
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- <a href="../职业规划/">
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- 职业规划
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- <ul class="articles">
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- <li class="chapter " data-level="10.2.1" data-path="../职业规划/给工作4年迷茫的程序员们的一点建议.html">
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- <a href="../职业规划/给工作4年迷茫的程序员们的一点建议.html">
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- 给工作 4 年迷茫的程序员们的一点建议
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- <li class="chapter " data-level="10.2.2" data-path="../职业规划/聊聊技术人员的常见的职业问题.html">
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- <a href="../职业规划/聊聊技术人员的常见的职业问题.html">
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- <div id="anchor-navigation-ex-navbar"><i class="fa fa-navicon"></i><ul><li><span class="title-icon "></span><a href="#leveldb源码分析19"><b></b>leveldb源码分析19</a></li><ul><li><span class="title-icon "></span><a href="#11versionset分析之2"><b></b>11.VersionSet分析之2</a></li><ul><li><span class="title-icon "></span><a href="#114-logandapply"><b></b>11.4 LogAndApply()</a></li><li><span class="title-icon "></span><a href="#115-approximateoffsetof"><b></b>11.5 ApproximateOffsetOf()</a></li></ul></ul></ul></div><h1 id="leveldb源码分析19"><a name="leveldb源码分析19" class="anchor-navigation-ex-anchor" href="#leveldb源码分析19"><i class="fa fa-link" aria-hidden="true"></i></a>leveldb源码分析19</h1>
- <p>本系列《leveldb源码分析》共有22篇文章,这是第十九篇</p>
- <h2 id="11versionset分析之2"><a name="11versionset分析之2" class="anchor-navigation-ex-anchor" href="#11versionset分析之2"><i class="fa fa-link" aria-hidden="true"></i></a>11.VersionSet分析之2</h2>
- <h3 id="114-logandapply"><a name="114-logandapply" class="anchor-navigation-ex-anchor" href="#114-logandapply"><i class="fa fa-link" aria-hidden="true"></i></a>11.4 LogAndApply()</h3>
- <p>函数声明:</p>
- <pre class="language-"><code>Status LogAndApply(VersionEdit*edit, port::Mutex* mu)
- </code></pre><p>前面接口小节中讲过其功能:在currentversion上应用指定的VersionEdit,生成新的<strong>MANIFEST</strong>信息,保存到磁盘上,并用作<strong>current version</strong>,故为Log And Apply。
- 参数edit也会被函数修改。</p>
- <h4 id="1141-函数流程"><a name="1141-函数流程" class="anchor-navigation-ex-anchor" href="#1141-函数流程"><i class="fa fa-link" aria-hidden="true"></i></a>11.4.1 函数流程</h4>
- <p>下面就来具体分析函数代码。
- <strong>S1 为edit设置log number等4个计数器。</strong></p>
- <pre class="language-"><code>if (edit->has_log_number_) {
- assert(edit->log_number_ >= log_number_);
- assert(edit->log_number_ < next_file_number_);
- }
- else edit->SetLogNumber(log_number_);
- if (!edit->has_prev_log_number_) edit->SetPrevLogNumber(prev_log_number_);
- edit->SetNextFile(next_file_number_);
- edit->SetLastSequence(last_sequence_);
- </code></pre><p>要保证edit自己的log number是比较大的那个,否则就是致命错误。保证edit的log number小于next file number,否则就是致命错误-见9.1小节。 </p>
- <p><strong>S2 创建一个新的Version v,并把新的edit变动保存到v中。</strong> </p>
- <pre class="language-"><code>Version* v = new Version(this);
- {
- Builder builder(this, current_);
- builder.Apply(edit);
- builder.SaveTo(v);
- }
- Finalize(v); //如前分析,只是为v计算执行compaction的最佳level
- </code></pre><p><strong>S3 如果MANIFEST文件指针不存在,就创建并初始化一个新的MANIFEST文件。这只会发生在第一次打开数据库时。这个MANIFEST文件保存了current version的快照。</strong></p>
- <pre class="language-"><code>std::string new_manifest_file;
- Status s;
- if (descriptor_log_ == NULL) {
- // 这里不需要unlock *mu因为我们只会在第一次调用LogAndApply时
- // 才走到这里(打开数据库时).
- assert(descriptor_file_ == NULL); // 文件指针和log::Writer都应该是NULL
- new_manifest_file = DescriptorFileName(dbname_, manifest_file_number_);
- edit->SetNextFile(next_file_number_);
- s = env_->NewWritableFile(new_manifest_file, &descriptor_file_);
- if (s.ok()) {
- descriptor_log_ = new log::Writer(descriptor_file_);
- s = WriteSnapshot(descriptor_log_); // 写入快照
- }
- }
- </code></pre><p><strong>S4 向MANIFEST写入一条新的log,记录current version的信息。在文件写操作时unlock锁,写入完成后,再重新lock,以防止浪费在长时间的IO操作上。</strong></p>
- <pre class="language-"><code>[cpp] view plain copy
- mu->Unlock();
- if (s.ok()) {
- std::string record;
- edit->EncodeTo(&record);// 序列化current version信息
- s = descriptor_log_->AddRecord(record); // append到MANIFEST log中
- if (s.ok()) s = descriptor_file_->Sync();
- if (!s.ok()) {
- Log(options_->info_log, "MANIFEST write: %s\n", s.ToString().c_str());
- if (ManifestContains(record)) { // 返回出错,其实确实写成功了
- Log(options_->info_log, "MANIFEST contains log record despiteerror ");
- s = Status::OK();
- }
- }
- }
- //如果刚才创建了一个MANIFEST文件,通过写一个指向它的CURRENT文件
- //安装它;不需要再次检查MANIFEST是否出错,因为如果出错后面会删除它
- if (s.ok() && !new_manifest_file.empty()) {
- s = SetCurrentFile(env_, dbname_, manifest_file_number_);
- }
- mu->Lock();
- </code></pre><p><strong>S5 安装这个新的version</strong></p>
- <pre class="language-"><code>if (s.ok()) { // 安装这个version
- AppendVersion(v);
- log_number_ = edit->log_number_;
- prev_log_number_ = edit->prev_log_number_;
- }
- else { // 失败了,删除
- delete v;
- if (!new_manifest_file.empty()) {
- delete descriptor_log_;
- delete descriptor_file_;
- descriptor_log_ = descriptor_file_ = NULL;
- env_->DeleteFile(new_manifest_file);
- }
- }
- </code></pre><p>流程的S4中,函数会检查MANIFEST文件是否已经有了这条record,那么什么时候会有呢?</p>
- <p>主函数使用到了几个新的辅助函数WriteSnapshot,ManifestContains和SetCurrentFile,下面就来分析。</p>
- <h4 id="1142-writesnapshot"><a name="1142-writesnapshot" class="anchor-navigation-ex-anchor" href="#1142-writesnapshot"><i class="fa fa-link" aria-hidden="true"></i></a>11.4.2 WriteSnapshot()</h4>
- <p>函数声明:</p>
- <pre class="language-"><code>Status WriteSnapshot(log::Writer*log)
- </code></pre><p>把currentversion保存到*log中,信息包括comparator名字、compaction点和各级sstable文件,函数逻辑很直观。</p>
- <ul>
- <li>S1 首先声明一个新的<strong>VersionEdit edit</strong>;</li>
- <li>S2 设置comparator:<strong>edit.SetComparatorName(icmp_.user_comparator()->Name())</strong>;</li>
- <li>S3 遍历所有level,根据compact<em>pointer</em>[level],设置compaction点:
- <strong>edit.SetCompactPointer(level, key)</strong>;</li>
- <li>S4 遍历所有level,根据current<em>->files</em>,设置sstable文件集合:<strong>edit.AddFile(level, xxx)</strong></li>
- <li>S5 根据序列化并append到log(MANIFEST文件)中;</li>
- </ul>
- <pre class="language-"><code>std::string record;
- edit.EncodeTo(&record);
- returnlog->AddRecord(record);
- </code></pre><p>以上就是WriteSnapshot的代码逻辑。</p>
- <h4 id="1143-manifestcontains"><a name="1143-manifestcontains" class="anchor-navigation-ex-anchor" href="#1143-manifestcontains"><i class="fa fa-link" aria-hidden="true"></i></a>11.4.3 ManifestContains()</h4>
- <p>函数声明:</p>
- <pre class="language-"><code>bool ManifestContains(conststd::string& record)
- </code></pre><p>如果当前MANIFEST包含指定的record就返回true,来看看函数逻辑。</p>
- <ul>
- <li><p>S1 根据当前的manifest<em>file_number</em>文件编号打开文件,创建<strong>SequentialFile</strong>对象</p>
- </li>
- <li><p>S2 根据创建的SequentialFile对象创建<strong>log::Reader</strong>,以读取文件</p>
- </li>
- <li><p>S3 调用log::Reader的ReadRecord依次读取record,如果和指定的record相同,就返回true,没有相同的record就返回false</p>
- </li>
- </ul>
- <p><strong>SetCurrentFile</strong>很简单,就是根据指定manifest文件编号,构造出MANIFEST文件名,并写入到CURRENT即可。</p>
- <h3 id="115-approximateoffsetof"><a name="115-approximateoffsetof" class="anchor-navigation-ex-anchor" href="#115-approximateoffsetof"><i class="fa fa-link" aria-hidden="true"></i></a>11.5 ApproximateOffsetOf()</h3>
- <p>函数声明:</p>
- <pre class="language-"><code>uint64_tApproximateOffsetOf(Version* v, const InternalKey& ikey)
- </code></pre><p>在指定的version中查找指定key的大概位置。
- 假设version中有n个<strong>sstable</strong>文件,并且落在了地i个sstable的key空间内,那么返回的位置<strong>= sstable1文件大小+sstable2文件大小 + … + sstable (i-1)文件大小
- + key在sstable i中的大概偏移</strong>。
- 可分为两段逻辑。</p>
- <ul>
- <li>首先直接和sstable的max key作比较,如果key > max key,直接跳过该文件,还记得sstable文件是有序排列的。
- 对于level >0的文件集合而言,如果如果key < sstable文件的min key,则直接跳出循环,因为后续的sstable的min key肯定大于key。</li>
- </ul>
- <ul>
- <li>key在sstable i中的大概偏移使用的是Table:: ApproximateOffsetOf(target)接口,前面分析过,它返回的是Table中>= target的key的位置。</li>
- </ul>
- <p><strong>VersionSet的相关函数</strong>暂时分析到这里,compaction部分后需单独分析。</p>
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