Understanding of Bio,nio,aio in JAVABlog Category:
Network programming
"Turn from" http://qindongliang.iteye.com/blog/2018539In the high-performance IO system design, there are several noun concepts that often confuse us. Specific as
The stream channel has two variants: SocketChannel and ServerSocketChannel. Like its corresponding Socket, SocketChannel is a channel for communication between interconnected terminals. SocketChannel: Create, connect, and close static SocketChannel
Socket programming practices in Linux (5) solutions for setting socket I/O timeout
(1) Use the alarm function to set timeout
#include
unsigned int alarm(unsigned int seconds);
Its main function is to set a signal transmission alarm.
On a "chat chat synchronous, asynchronous, blocking and non-blocking" has been popular explanation, to understand the synchronous, asynchronous, blocking and non-blocking important two conceptual points, have not seen, it is recommended to read this
In the high-performance IO system design, there are several noun concepts that often confuse us. Specific as follows:1 What is synchronization?2 What is async?3 What is blocking?4 What is non-blocking?5 What is sync blocking?6 What is synchronous
0 Preface
When learning network programming, we always write from the simplest server program:
Socket-> Bind-> Listen-> accept-> Read-> write-> return
The next step is to learn how to handle concurrent requests from clients. The main ideas are: Use
performance Analysis of five I/O models
Another advantage of overlapping I/O models is that Microsoft provides some unique extension functions for overlapping I/O models. When using the overlapped I/O model, you can choose to use a different
To put it more simply:
Obstruction is not the end of the work, no return,Non-group games you do it first, I'll see if there's anything else. Tell me when it's over.
Let's take the most commonly used send and recv two functions ...For example, you
In detail before JDK 1.4, Java IO Operations were concentrated in the Java.io package and were based on the streaming synchronization (blocking) API. For most applications, such APIs are easy to use, however, some applications with high performance
This article was reproduced from: http://mp.weixin.qq.com/s?__biz=MzAxODI5ODMwOA==&mid=2666538919&idx=1&sn= 6013c451b5f14bf809aec77dd5df6cff&scene=21#wechat_redirectOn a "chat chat synchronous, asynchronous, blocking and non-blocking" has been
The first kind of explanation:
Take the TCP transmission as an example in the socket transfer. Suppose Server a client B communicates. First, you need to establish a listening thread on machine A. Listening to a certain port, then B machine can send
Another advantage of the overlapping I/O models is that Microsoft provides some unique extension functions for overlapping I/O models. When using the overlapped I/O model, you can choose to use a different completion notification method. &NBSP
Basic concepts• Buffer operationBuffers and operations are the basis of all I/O, and the process performs I/O operations, which boils down to making a request to the operating system to either drain (write) The data in the buffer or fill the buffer (
When writing a program, it takes a long time to finish a large function, but suddenly there is a need for a small function that needs to be completed first, then it pauses the big function, the first little function, this way is called blocking. As
WSAAsyncSelect function
The wsaasyncselect function requests Windows message-based notification of the network events for a socket.Syntaxc++
int WSAAsyncSelect ( _in_ SOCKET S, _in_ hwnd hwnd, _in_ unsigned int wmsg, _in_ long
Server: Socket->address->bind->listen->loop{accpet->read->write->close (auto socket)}->close (Listen socket)1) because it is blocking mode, the client does not shut down when the server is blocked in the Read function,2) Disconnect after the client
This paper mainly analyzes several kinds of socket programming modes. Mainly includes basic blocking sockets, nonblocking sockets, I/O multiplexing. Of these, blocking and non-blocking are relative to sockets, while others are essentially
Simply put:Blocking is to do not come back, has been in the waiting, until the completion of the process to return;Non-blocking is the first thing you do, I'll see if there's anything else. No, a find things are stuck, immediately report the
A.Recently in the study of Redis's Pub/sub (publish subscription feature), use the interface provided by Phpredis to manipulate data.
Current questions:
1. How to set up to solve the timeout limit of Redis subscribe?
Timeout in redis.conf
PHP implements methods for connecting devices, communicating, and sending commands, and PHP commands
This article describes how PHP implements connection devices, communication, and sending commands. Share to everyone for your reference. Specific
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