gateway aio

Over the past few days, I have been working on a large volume of data solutions for linux. I have continuously learned about aio, epoll, libevent, boost: asio. In the past, I only knew that they are both asynchronous and non-blocking, but what are the key points to solve the problem? Through these several days of in-depth understanding, I will summarize them:Aio is the asynchronous IO implemented by the kernel after linux2.6, or it is the true asynchr

1. Synchronous and asynchronousSynchronization: A task runs after the next task is runAsync: Start a new thread after receiving a task to run this task, basically do not occupy the original thread time2. Blocking and non-blockingBlocking: When multiple threads access a single piece of data at the same time, only one thread is accessing it and the other is waitingNon-blocking: Multiple threads can access the same piece of data at the same time3.nio and IO and

Keywords: NIO, Io,bio,aio and evolution reasons I do not really understand NIO, this article is only a brief introduction of the code under the https://github.com/zhaikaishun/NettyTutorial socket01 Traditional bio communication: Synchronous blocking mode Look at the picture, invade and delete The traditional model is the Bio mode, which is synchronized blocking, just look at the example below.Server Side ServerSocket server = null; Bio, use

me through callback.The blocking mechanism is: when you wait for a response, you will suspend yourself until you get the result of this book.The non-blocking mechanism is: no matter whether the boss tells you, you play first, but check whether the boss has answered you later.Ii. Bio (Block Io blocking Io): the server will open a dedicated thread for each client link, that is, the relationship between 1vs1. The number of threads that a server can start is fixed, if a bunch of requests come in, t

channel. The channel differs from the flow where the channel is bidirectional and can be used for read, write, and simultaneous reading and writing operations.The channels of the underlying operating system are generally full-duplex, so full-duplex channel streams can better map the underlying operating system's APIs.There are two major types of channel:1.SelectableChannel: User network read/write2.FileChannel: For file operationThe Serversocketchannel and Socketchannel that follow the code are

!"); return-1; } Const Char*filepath ="MyFile.txt"; Constmode_t mode = S_IRUSR | S_IWUSR | S_irgrp |S_iroth; Sfiledesc=Open (FilePath, o_rdonly, mode); if(Sfiledesc = =-1) {printf ("The file:%s cannot be opened!\n", FilePath); return-1; } Const LongFilelength = Lseek (Sfiledesc,0, Seek_end); Lseek (Sfiledesc,0, Seek_set); Membuffer= malloc (Filelength +1); Membuffer[filelength]=' /'; structAIOCB Aiobuffer; Aiobuffer.aio_fildes=Sfiledesc; Aiobuffer.aio_offset=0; Aiobuffer.aio_buf=Membuffer;

things, only waiting for someone else (System) to help him to fix the time to give him a word back. The event separator waits for the completion of the Read event (compared with the reactor); When the event separator silently waiting for the completion of things to come, while the operating system has started to work, it read data from the target, put into the buffer provided by the user, and finally notify the incident separator, this thing I finished; event handler prior to notification by ev

Reprint please indicate the source: http://blog.csdn.net/anxpp/article/details/51512200, thank you. This article will be from the traditional bio to NiO to the AIO from the shallow to the deep introduction, and enclose the complete code explanation. This example is used in the following code: The client sends a formula string to the server, and the server evaluates the result to the client. All the instructions for the code, directly as comments, embe

Java Network IO Programming, from traditional bio (synchronous blocking) to NiO (synchronous non-blocking) to AIO (asynchronous non-blocking). Scenario: The client wants to send a request to the server, the server will set up a thread response for each client, the problem is, if the client has a delay and other exceptions, more network anomalies, so that the server for its established thread, has been in the waiting state, This thread takes a long ti

For SynchronizationI/O,WhenI/OOperation execution,The application must wait,Till nowI/OExecuted.Opposite,AsynchronousI/OOperation running in the background, I/OOperations and applications can run simultaneously,Improved system performance.Use asynchronousI/OWill improveI/OTraffic,If the application is operating on a bare Device,This advantage is more obvious. Therefore, similar to databases,Applications such as file servers often use AsynchronousI/O,Make multipleI/OOperation execution at the sam

: 32Aioserver... You can change the AIO parameters for your system withChdevCommand onAio0Pseudo-device, or by runningSmitty AIOOn AIX 5.3 systems-You can even use the poorly encrypted entedAiooCommand. An important thing to remember though-is that you can set the values online, with no interruption of service-But-They will not take affect until the next time the kernel is booted. Some additional documentation is available at the locations below: Ht

premise of a bucket to connect the hydraulic, this bucket is the buffer. That is, others may have to wait, but not at the scene, but go home and so on, you can do other things, water is full, the water union to inform them.This is actually very close to the current social division of labor refinement of the reality, but also the use of existing resources to achieve the concurrency effect of a very economic means, rather than to a parallel processing, although that is the simplest, but also the

AIO-3288C Android8.1 firmware has been released!"Firmware Update"1. Support HDMI audio output2. Support ap6212/ap6236 WiFi bluetooth module3. Support Camera OV138504. Support Ethernet5, Support ES83236, Support RS2327. IR IR Remote control support8. Modify LAUNCHER3 display mode9, added the left mouse button click Support, the right mouse button is always set as the return key10. Fixed the problem that the all apps interface can't use remote control11

:" + This.threadpoolsize); Executorservicethreadpool=executors.newfixedthreadpool (this.threadpoolsize); Asynchronouschannelgroupchannelgroup=asynchronouschannelgroup.withthreadpool (ThreadPool); Finalasynchronousserversocketchannelassc=asynchronousserversocketchannel.open ( Channelgroup); if (this.backlog>0) {assc.bind (Serveraddress,this.backlog);}else{ Assc.bind (serveraddress); }logger.info ("Aioserverlisten:" +this.serveraddress); Assc.accept (NULL, newCompletionHandler Aiotest1.java stati

This article will be from the traditional bio to NiO to the AIO from the shallow to the deep introduction, and enclose the complete code explanation. This example is used in the following code: The client sends a formula string to the server, and the server evaluates the result to the client. All the instructions for the code, directly as comments, embedded in the code, see the code is easier to understand, the code will use a calculation of the resul

　　1, what is the gateway According to different classification criteria, there are many kinds of gateways. The gateway in the TCP/IP protocol is the most commonly used, where we speak of "gateways" that refer to the TCP/IP protocol gateway. What is a gateway? A gateway is e

Gateway-Gateway Protocol (GGP) To Route packets correctly and efficiently, the core gateway needs to know the situation of other parts of the Internet, including routing information and subnet characteristics. This type of information is usually used when a gateway processes heavy loads and is the only way to access th

First, IntroBefore the gateway, many netizens concerned about how to implement the interface. To understand the change of the next machine variable, it is how to trigger the human-machine interface animation in one step.This step-by-step trigger is essentially a bulk data change (DataChange) event for the variable group (s), which raises the variable (TAG) value Update (ValueChange) event, which eventually triggers an animated script (Action) of the e

You can try to clear the browser cache access to your FTP to see if you can log in Successfully resolved 502 Bad Gateway error Log on Today, show 502 bad Gateway,nginx the most annoying place is often this error, because I do not intend to spend too much time on the technology, so the general is encountered related problems, through the search engine solution can not go into the deep. Don't say much nonse

You can try to clear the browser cache and access your FTP to see if you can log on Cause A server (not necessarily a Web server) serves as a gateway or proxy to meet customer requirements (such as a Web browser or our CheckUpDown robot) to access the requested URL. This server receives an invalid response from the upstream server to fulfill its requirements.Fixed 502 errorsGenerally, this problem is caused by poor communication between IP addresses o