vpn reactor

IO design mode: Reactor vs. ProactorOpen source products such as Redis, ACE, and event model are used in the reactor mode, while the same event handling proactor, due to operating system reasons, the relevant open source products are also few; here to learn its model structure, the focus of comparison between the two similarities and differences;Reactor Reactorre

This article compares the IPSec VPN and ssl vpn technologies in detail, so that users from all walks of life can better understand the VPN technology and select the appropriate VPN product. Another VPN implementation technology different from the traditional

The event handling mechanism of reactorFirst, recall the mechanism of the normal function call: The program calls a function? function execution, program wait? function returns the result and control to the program? The program continues processing.Reactor the definition of "reactor" is an event-driven mechanism. Unlike normal function calls, where an application is not actively invoking an API to complete processing, instead of

, slightly different. When the calling function returns immediately, it also tells the caller that the request has already started. The system uses a different resource or thread to complete the call, and knows the caller when it is done (for example, through a callback function). In the case of POSIX aio_read (), after invoking it, the function returns immediately, and the operating system begins the read operation in the background. That is to give the work to the kernel to complete this opera

With the advent of IO multiplexing technology, there are many event processing modes. The synchronous I/O model is typically implemented by the reactor pattern, while the asynchronous I/O model is implemented by the proactor pattern. Reactor mode: As shown above, the reactor mode is also called a reactor

1. Standard definitionTwo I/O multiplexing modes: Reactor and ProactorGenerally, the I/O multiplexing mechanism relies on an event demultiplexer. The Separator object separates the I/O events from the event source and distributes them to the corresponding Read/write event handler (the event Handler). The developer pre-registers the events and their event handlers (or callback functions) that need to be processed, and the event separator is responsible

Generally, the I/O multiplexing mechanism relies on an event demultiplexer. The Separator object separates the I/O events from the event source and distributes them to the corresponding Read/write event handler (the event Handler). The developer pre-registers the events and their event handlers (or callback functions) that need to be processed, and the event separator is responsible for passing the request events to the event handler. The two patterns associated with event separators are

(Original)I bought the 2007.4 issue of programmer magazine yesterday and read it for the first time. One of the two high-performance I/O design patterns is eye-catching, this is a translation. I have been trying to carefully read this article for a long time. In this article, the I/O methods of the system can be divided into blocking, non-blocking synchronous and non-blocking asynchronous. Among the three methods, the non-blocking asynchronous mode has the best scalability and performance. I mai

Java, C #, and C ++. we will not mention the blocking scheme later in this article, because the blocking I/O is really not scalable, and the performance cannot meet the requirements of high-performance servers. Two Io multiplexing solutions: reactor and proactor In general, the I/O reuse mechanism is requiredEvent sharer(Event demultiplexor [1,3]). the role of the event sharer is to distribute the read/write event sources to the handlers of various r

In the high-performance I/O design, there are two well-known modes: reactor and proactor. The reactor mode is used to synchronize I/O, while the proactor is used for asynchronous I/O operations. Before comparing these two modes, we should first understand several concepts, what is blocking and non-blocking, and what is synchronous and asynchronous, synchronization and Asynchronization are for the interacti

reactor pattern is similar to event handling in AWT: Reactor Mode participants 1.Reactor is responsible for responding to IO events, which, when they occur, are sent to the corresponding handler to handle, which is similar to the AWT thread2.Handler is responsible for non blocking behavior, similar to AWT actionlisteners, and is responsible for binding handlers

Reactor: an architecture pattern used for event Multi-Channel Separation and allocationGenerally, a file or device specified by a file descriptor can work in two ways: blocking and non-blocking. Blocking means that when you try to read and write the file descriptor, the program enters the waiting state if there is nothing to read at the time or it cannot be written at the moment, until something is readable or writable. For non-blocking states, if not

Both reactor and preactor are Io multiplexing modes. Generally, the I/O multiplexing mechanism depends on an event multiplexing (EventDemultiplexer ). The splitter object can separate the I/O events from the event source and distribute them to the corresponding read/write event processor (EventHandler ). The developer registers the event to be processed and its event processor (or callback function) in advance ). The

I/O multiplexing, select and reactor modes, the relationship between the respective concepts, and, most importantly, their strengths, and why they have such advantages over their peers. This is the original starting point for writing this text. I/O multiplexing I/O multiplexing belongs to one of the I/O models:1. Blocking I/O:2. Non-blocking I/O:3. I/O multiplexing model4. Signal-driven I/O model5. Asynchronous I/O modelThe comparisons between the abo

1. Reactor mode Overview Reactor interprets "reactors" as an event-driven mechanism. Unlike common function calls, an application does not actively call an API to complete processing. Instead, the reactor reverses the event processing process, the application must provide the corresponding interfaces and register them with the

The Hollywood principle is "Don't call us, we will call you to inform you". In fact, this is the reactor mode. You don't have to keep asking if an event has happened. When it happens, you will be notified. It is generally used to process concurrent requests on the server. Let's take a look at several participants in the reactor mode. Event processor: corresponds to a descriptor to implement the services

Reactor is an event-driven architecture that ace_reactor the programmer's burden of monitoring the underlying network IO events, and typically programmers simply inherit the Ace_event_handler class, rewrite the associated interface handler, and then Ace_ The reactor object registers related events, and the definition of the event is defined in the Ace_event_handler class.Research

Netty is the core of the reactor thread, the corresponding project uses a wide range of nioeventloop, so what is the nioeventloop inside exactly what is doing? How does Netty ensure efficient polling of event loops and timely execution of tasks? And how to gracefully fix the NIO bug of the JDK? With these questions, this article will discovering to take you through the truth about Netty reactor threads [sou

in a production environment, a boss thread is typically used to monitor IO-ready events, and a work thread pool is responsible for specific IO read-write processing. After the boss thread detects a new IO-ready event, it completes the assignment of the IO Operation task based on the event type and assigns the specific action to the work thread. This is actually the core idea of the reactor model.3.2.3 Reactor