One, the address structure of the socket.The IPV4 socket address structure is also commonly referred to as the "internetwork socket address Structure", which is sockaddr_inNamed POSIX is defined as follows:#include structin_addr{unsignedLongS_ADDR;/*
1, how to communicate between processes in the network?The local interprocess communication (IPC) is available in a number of ways, but can be summarized in the following 4 categories:Message delivery (pipeline, FIFO, Message Queuing)Synchronization
Thinkphp as a domestic popular framework, I believe that the use of people must be a minority. In this article, we will analyze the important part of thinkphp--the connection of distributed database.
Of course, we're not here to use the model to
Access | data | database
"Summary" If you want to use more than one database, it seems to be powerless, this article describes the expansion of phplib, so that you have the cake and eat, while using Phplib can use multiple databases, and from which
1. How processes communicate across the network
The concept of process communication originated from a stand-alone system. Since each process operates within its own address range, it is guaranteed that two communication
and coordinated work between
Qobject This class is the core of the Qt object model, and most of the QT classes inherit from this category. The central feature of this model is a mechanism called signals and slots (signal and slots) to communicate between objects, you can
How to Use the cursor when using sqlite3 in python and pythonsqlite3
Cursor Is a Cursor object, which is a MySQLdb object that implements the iterator (def _ iter _ () and generator (yield, at this time, no data exists in cursor. Only when fetchone (
Socket socket TCP Apisocket concept
Socket, also known as "socket", is a network of interprocess communication data channel of an endpoint, or called a handle. IP address + port number you can uniquely identify a socket.
The TCP/IP
Python parameter description for connecting to the MySQLconnect function
Parameters for connecting python to the MySQL connect function
Parameters for connecting python to the MySQL connect function
Cxn = MySQLdb. Connect (host = 'localhost',
What is TCP/IP ,UDP ? TCP/IP (transmission Control protocol/internet Protocol) is a protocol/inter-network protocol, an industry-standard set of protocols designed for wide area networks (WANs).UDP (user Data Protocol, Subscriber Datagram Protocol)
The communication model of socket communication in linux-general Linux technology-Linux programming and kernel information. The following is a detailed description. Guidance:
1. Socket Introduction
Socket is a TCP/IP network API that can be used to
Thinkphp as the domestic mainstream framework, I believe that the use of people must be a minority. Today, let's take a look at how the distributed database is connected in thinkphp.
Of course, we are not here to use the model to make the database
1. What is a distributed database:
The distributed database of TP is mainly through this configuration:
' Db_deploy_type ' + 1,//Database deployment method: 0 Centralized (single server), 1 distributed (Master-slave server)
2. What is the
Study Notes on Unix Network Programming Based on TCP socket programming
1. socket Functions
Int socket (int family, int type, int protocol)
Returns a socket descriptor. Error returned-1
Family indicates the protocol family. Generally, IPv4 is
1, how to communicate between processes in the network?
2. What is socket?
3. Basic operation of socket
3.1. Socket () function
3.2. Bind () function
3.3, listen (), connect () function
3.4. The Accept ()
Reference from:http://www.cnblogs.com/skynet/archive/2010/12/12/1903949.html (Wu Qin)1, Socket IntroductionThere are several methods for local interprocess communication (IPC):1) Message Delivery (PIPE, FIFO, message queue, etc.)2) Synchronization
Use PHPLIB to access multiple databases. read about using PHPLIB to access multiple databases. PHPLIB is an extension library of PHP. using it, we can easily perform various operations on the database. However, if you want to use multiple databases,
Socket functionIn order to perform network I/O, the first thing a process must do is call the socket function, specify the desired type of communication protocol (TCP using IPV4, UDP with IPv6, UNIX domain byte throttle protocol, etc.)#include int
There are two types of UDP
One is for connectionless (that is, the connect function is not used)
One is connection-oriented like TCP (that is, using the connect function)
Differences:
1> the I/O function used is:
Former: sendto recvfrom
The latter:
Document directory
Connection timeout
In highly concurrent network programming, if the socket timeout is not controlled, the program will die very hard.
Here, the timeout time must be controlled in three parts: Connection timeout, read timeout,
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