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Non-blocking I/O Server Model and blocking I/O Server Model Let's take a look at this situation. You and thousands of players are super fans of World of Warcraft. Every weekend, they will form a group of bosses. The game server is Alexander every weekend, because at least several hundred thousand users are online at the same time. Is it feasible to use our multi-thread
Blocking queues: Thread safety Sort elements by FIFO (first-in first out). The head of the queue is the element with the longest time in the queue. The tail of the queue is the element with the shortest time in the queue. The new element is inserted at the end of the queue, and the queue retrieval operation obtains the element at the head of the queue. The throughput of a linked queue is typically higher than an array-based queue, but in most concurre
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 soon as the small function is done, continue to function bigger. This is the usual synchronous (synchronous) or blocking (B
) they handle.Ii. Blocking and non-blockingBlocking/non-blocking. They are the status when the program is waiting for the message (it doesn't matter whether it is synchronous or asynchronous.1. ConceptsA. BlockingBlocking call means that the current thread will be suspended before the call result is returned. The function is returned only after the result is obtained.Some people may equate
During network programming, we often see four call Methods: synchronous, asynchronous, blocking, and non-blocking. These methods are not easy to understand. The following is my understanding of these terms. SynchronizationThe so-called synchronization means that when a function call is sent, the call will not return until the result is not obtained. According to this definition, most functions are called sy
I/O model Five I/O models available in UNIX: (1) blocking I/O (2) non-blocking I/O (3) I/O multiplexing (select and poll) (4) signal-driven I/O (SIGIO) (5) asynchronous I/O For input operations on a set of interfaces, the first step usually involves waiting for data to arrive from the network. When the waiting group arrives, it is copied to a buffer in the kernel. The second step is to copy data from
Blocking in a RAC environment is different from a single-instance case, because we need to take into account the sessions that are in different instances. That is to say, the v$session,v$lock corresponding to the previous query to the global scope to find. This article provides 2 query scripts and shows examples of which sessions are blocked and which are blocked. For the concept of blocking and
Let's take a look at the concept of blocking and non-blocking: Blocking is the thread function that keeps the current calling thread in the middle of a stop waiting, pending state. Non-blocking is no matter how the results of the operation will continue to execute (often have to deal with many return results), the thre
procedure call is issued, the caller cannot immediately obtain the result. When the part that actually handles this call is completed, the caller is notified by status, notification, and callback. Blocking: A blocking call means that the current thread is suspended before the call result returns. The function is returned only after the result is obtained. Non-blockin
I. OverviewWhat is the difference between synchronous (synchronous) IO and asynchronous (asynchronous) Io, what is blocking (blocking) IO and non-blocking (non-blocking) IO respectively? The problem is that different people may give different answers, such as wikis, that asynchronous IO and non-
Old Zhang loves drinking tea, without talking nonsense, and boiling water. Appearance character: Lao Zhang, two kettle (ordinary kettle for short; ring kettle for short ). 1. Old Zhang put the kettle on the fire and waited for the water to open. (Synchronous blocking) Lao Zhang thinks he is a bit silly. 2. Old Zhang put the kettle on the fire, went to the living room to watch TV, and went to the kitchen from time to see if the water was open. (Non-
From: http://blog.chinaunix.net/uid-24517549-id-4044877.html first socket is blocked by default, which makes the sending and receiving operations in the blocking state, that is, the call does not return immediately, but enters the sleep waiting for the Operation to complete. 1. Select send (TCP in this example) and sendto (UDP in this example) to describe sending. The first thing to note is that no matter whether it is blocked or not blocked, data wi
The synchronous and asynchronous mechanisms in network communication describe communication patterns. Synchronization mechanism, refers to the sender after sending a request, waiting to receive a response sent back by the receiver before starting to send the next request, the asynchronous mechanism, in contrast, refers to the sender after sending a request, do not wait for the receiver to respond to the request to continue to send write a request. All requests from the sender form a queue, and t
IO Model Description:* Blocking IO blocking IO* nonblocking io non-blocking IO* IO multiplexing IO multiplexing* Signal driven IO signal driver io ()* Asynchronous IO Asynchronous IOIO Model Description: To better understand the IO model, we need to review it in advance: synchronous, asynchronous, blocking, non-blockin
) they handle.Ii. Blocking and non-blockingBlocking/non-blocking. They are the status when the program is waiting for the message (it doesn't matter whether it is synchronous or asynchronous.1. ConceptsA. BlockingBlocking call means that the current thread will be suspended before the call result is returned. The function is returned only after the result is obtained.Some people may equate
Original: http://blog.csdn.net/historyasamirror/article/details/5778378 When you find that your most popular blog is a big mistake, this is definitely not a pleasant thing to do.IO-Sync, asynchronous, blocking, non-blocking I wrote when I began to learn Epoll and libevent, and the main idea came from the link in the article. After writing to find a lot of people like, I am still very happy, it also shows t
Turn from: http://blog.csdn.net/historyasamirror/article/details/5778378 When you find that your most popular blog is a big mistake, this is definitely not a pleasant thing to do.IO-Sync, asynchronous, blocking, non-blocking I wrote when I began to learn Epoll and libevent, and the main idea came from the link in the article. After writing to find a lot of people like, I am still very happy, it also shows
Synchronous asynchronous and non-blocking, synchronous asynchronous Blocking Synchronous/asynchronous and blocking/non-blocking have different meanings in different scenarios. In the operating system Blocking statusIt means that when a running process is temporarily unab
1. What do the returned values of Recv in blocking mode and non-blocking mode mean? Is there a difference? (As far as I know at present, there is no distinction between blocking and non-blocking Recv return values, all of which are 2. What do the return values of write in blocki
A very important job of a Web application is to transfer data. The process of transferring data varies depending on which "vehicle" is used, but the way it is transmitted is the same: it is transmitted in bytecode. The process and manner in which the Java Development Network program transmits data is abstracted, we do not need to pay attention to the underlying interface, only need to use the Java API or other network framework to achieve the purpose of data transmission. Both the sending and re
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