com © 2024 Bloomberg Finance L.P. All rights reserved. • Create a basic HTTP server. • Allow a single-threaded server handling multiple clients. • Use the sender/receiver asynchronous framework.

现在假定文件系统有这样几个文件，根据上面的分片方式，parent为"/"和"/A/C"在server0上，parent为"/A"和"/A/D"在server1上，parent为"/B"在server2上。© XXX Page 12 of 24 元数据 server 0 server 1 server 2 inode信息 0 → inode / 300 → inode C 100 → 5.1.1 场景分析 查找：查找/A/C。 1、client给server0发送请求：parentid 0 + name "A"，查询"A"的inodeid为100© XXX Page 13 of 24 2、client给server0发送请求：inode 100，查询的"A"的inode信息。 3、client给server1发送请求：parentid 100 + name "C"，查询"C"的inode为300 4、client给server1发送请求：inode 300，查询"C"的inode信息。 创建：/A/C不在，创建/A/C 1、client给server0发送请求：parentid 0 + name "A"，查询"A"的inodeid为100 2、client给server0发送请求：inode 100，查询的"A"的inode信息。 3、client给server1发送请求：parentid

Supported guest operating systems . . . . . . . . . . . . . . . . . . . . . . . . . 42 3.1.1 Mac OS X Server guests . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 3.1.2 64-bit guests . . . . . . . 97 7.1.2 VBoxHeadless, the remote desktop server . . . . . . . . . . . . . . . . . 98 7.1.3 Step by step: creating a virtual machine on a headless server . . . . . . 99 7.1.4 Remote USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 7.1.7 Multiple connections to the VRDP server . . . . . . . . . . . . . . . . . 103 7.1.8 Multiple remote monitors . . . . . . . . . . . . . .

101 7.1.2 VBoxHeadless, the remote desktop server . . . . . . . . . . . . . . . . . 102 7.1.3 Step by step: creating a virtual machine on a headless server . . . . . . 103 7.1.4 Remote USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 7.1.7 Multiple connections to the VRDP server . . . . . . . . . . . . . . . . . 107 7.1.8 Multiple remote monitors . . . . . . . . . . . . . . the address of a NAT network interface . . . . . . . . . . . 166 9.12.2 Configuring the boot server (next server) of a NAT network interface . . 166 9.12.3 Tuning TCP/IP buffers for NAT . . . . . . . . .

108 7.1.2 VBoxHeadless, the remote desktop server . . . . . . . . . . . . . . . . . 109 7.1.3 Step by step: creating a virtual machine on a headless server . . . . . . 110 7.1.4 Remote USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 7.1.7 Multiple connections to the VRDP server . . . . . . . . . . . . . . . . . 114 7.1.8 Multiple remote monitors . . . . . . . . . . . . . . the address of a NAT network interface . . . . . . . . . . . 209 9.11.2 Configuring the boot server (next server) of a NAT network interface . . 210 9.11.3 Tuning TCP/IP buffers for NAT . . . . . . . . .

108 7.1.2 VBoxHeadless, the remote desktop server . . . . . . . . . . . . . . . . . 109 7.1.3 Step by step: creating a virtual machine on a headless server . . . . . . 110 7.1.4 Remote USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 7.1.7 Multiple connections to the VRDP server . . . . . . . . . . . . . . . . . 114 7.1.8 Multiple remote monitors . . . . . . . . . . . . . . the address of a NAT network interface . . . . . . . . . . . 208 9.11.2 Configuring the boot server (next server) of a NAT network interface . . 209 9.11.3 Tuning TCP/IP buffers for NAT . . . . . . . . .

的水平扩展和高可用特点，首先需要了解 TiDB 的整体架构。 TiDB 集群主要分为三个组件： TiDB Server 负责接收 SQL 请求，处理 SQL 相关的逻辑，并通过 PD 找到存储计算所需数据的 TiKV 地址， 与 TiKV 交互获取数据，最终返回结果。 TiDB Server 是无状态的，其本身并不存储数据，只负责计算，可以无限水平扩展，可以通过负载均衡组件（如 LVS、HAProxy 集群进行调度和负载均衡（如数据的迁移、Raft group leader 的迁 移等）；三是分配全局唯一且递增的事务 ID。 PD 是一个集群，需要部署奇数个节点，一般线上推荐至少部署 3 个节点。 TiKV Server 负责存储数据，从外部看 TiKV 是一个分布式的提供事务的 Key-Value 存储引擎。存储数据的基 本单位是 Region，每个 Region 负责存储一个 Key Range （从 StartKey 为单位进行调度。 TiDB Server PD Server TiKV Server 核心特性 水平扩展 README - 12 - 本文档使用 书栈(BookStack.CN) 构建 无限水平扩展是 TiDB 的一大特点，这里说的水平扩展包括两方面：计算能力和存储能力。TiDB Server 负责处理 SQL 请求，随着业务的增长，可以简单的添加 TiDB Server 节点，提高整体的处理能力，提供更高的吞吐。TiKV

103 7.1.2 VBoxHeadless, the remote desktop server . . . . . . . . . . . . . . . . . 104 7.1.3 Step by step: creating a virtual machine on a headless server . . . . . . 105 7.1.4 Remote USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 7.1.7 Multiple connections to the VRDP server . . . . . . . . . . . . . . . . . 109 7.1.8 Multiple remote monitors . . . . . . . . . . . . . . the address of a NAT network interface . . . . . . . . . . . 174 9.11.2 Configuring the boot server (next server) of a NAT network interface . . 175 9.11.3 Tuning TCP/IP buffers for NAT . . . . . . . . .

RequestHandler which is subclassed to create web applications, and various supporting classes). • Client- and server-side implementions of HTTP (HTTPServer and AsyncHTTPClient). • An asynchronous networking library protocols. The Tornado web framework and HTTP server together offer a full-stack alternative to WSGI. While it is possible to use the Tornado HTTP server as a container for other WSGI frameworks (WSGIContainer) framework and HTTP server together. 6.1.2 Asynchronous and non-Blocking I/O Real-time web features require a long-lived mostly-idle connection per user. In a traditional synchronous web server, this implies

httpserver — Non-blocking HTTP server tornado.httpclient — Asynchronous HTTP client tornado.httputil — Manipulate HTTP headers and URLs tornado.http1connection – HTTP/1.x client/server implementation Asynchronous utilities tornado.tcpclient — IOStream connection factory tornado.tcpserver — Basic IOStream-based TCP server Coroutines and concurrency tornado.gen — Generator-based coroutines tornado.locks – Synchronization RequestHandler which is subclassed to create web applications, and various supporting classes). Client- and server-side implementions of HTTP (HTTPServer and AsyncHTTPClient). An asynchronous networking library including