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withscoresAgora games is a good example. It is implemented in Ruby, and its ranking is to store data using redis. You can see it here.(5) Publish/SubscribeThe last (but certainly not least) is the redis release/subscription function. There are many scenarios for publishing/subscription. I have seen people use it in so

Preface This digest is self-aware. Question 0: Why can we separate the ground in a digital analog hybrid circuit? Some of my answers have not been approved by anyone before. If there is any infringement, please contact the blogger's email to delete it. Thank you.@ Operation amplifier answer The following is the original article: @ magic sub's answer

read at least records that are not Commit or Rollback, rather than sitting in front of a browser. However, "Snapshot isolation" in SQL Server 2005 is disabled by default. If the system developed with SQL Server is afraid of locking users, you can switch to the loose "ReadUncommitted" transaction isolation level as required by the project. This feature does not c

pictures from the web, the author is unknownAs long as the professionals, talk about the "details" of the word estimate is easy to associate with the "details determine success or failure" sentence. Because this sentence no one knows, no one does not know, so that the "details" is easy to mistakenly think is a slogan.

questions. For the question of "what to do", it may be relatively simple for beginners. In fact, in large-scale project development, such as ERP, enterprises cannot elaborate on the need to implement specific functions, this requires dedicated personnel to explore specific functions. The terminology of this application is called requirement analysis. For example, if someone

access point, that is, wireless access points. In simple terms, WiFi sharing in the Internet wireless switch, it is the mobile terminal users into the wired network access point, mainly for home broadband, enterprise internal network deployment, wireless coverage distance of dozens of meters to hundreds of meters, the current main technology for the 802.11X seri

service completely, and even network connections are not needed. 　　 DynamoDB Local is so good, but it can only be used for local development and testing purposes. When an app is released online, you still need to switch the database to the real Dynamodb Web service. But just the need to switch the database service, th

When someone asked me what is Softswitch, I directly replied: the network architecture with media gateway is SoftSwitch. Now we can see that a general computer is used as a telephone switch, so it is a soft

This article is introduced into the kernel lock by this problem, and concludes as follows Why do I need a kernel lock? Multi-core processors, there will be several processes in the kernel state, and in the kernel state, the process can access all kernel data, so to protect the shared data, that is, mutual exclusion What are the kernel locking mechanisms? (1) Ato

interruption, will interrupt the running program. After the execution of the program, the CPU will be returned to the operating system, thereby continuing the operation of the operating system itself, which becomes a single task operating system, the typical representative is DOS. Now the operating system for the system clock interruption, developed a special interrupt server program, that is, multitaski

Recently I saw an article on the anti-three layer, and my hands are also itchy. I will sacrifice some time to discuss this old topic. 1. What is Layer 3? Many people love to confuse the three-layer architecture with MVC, but we can consider their differences from the simplest perspective: In the design pattern, there is usually such a chapter, the MVC design patt

Refcountedthreadsafe's reference count is atomic, so the online search for unified parlance thread safety, Refcountedthreadsafe also has a lot of non-atomic operations, what does it mean by thread safety?For example, is it thread safe to refcountedthreadsafe across threads with scoped_refptr operations? Write a simple sample test: Class Test:public base::refcount

again. 3 close: sudo passwd-l Root I really don't know what to do. Too many small Linux releases have a headache for users !! For example, Ubuntu has to be used recently. Because it does not set the root password during installation, it is obviously unable to log on as root because it does not have the initial password, you cannot switch to the root node through

Chapter 6 What is a datasetDelphi 4 has four types of Standard dataset components: tTable, tquery, tstoredproc, and tclientdataset. These dataset components are inherited from a common basic class tdataset, where only tclientdataset is inherited directly from tdataset, while tTable, tquery, and tstoredproc are directly inherited by tdbdataset, the upper level of

distributing computing on a large number of Distributed Computers, rather than local computers or remote servers, enterprise data centers will run more like the Internet. This allows enterprises to switch resources to the desired applications and access computers and storage systems as needed.This is a revolutionary action. For example, it is like switching from

At the beginning of the article, I declare that this is another article with no question. Basically, I want to talk about how to learn English at the same time when learning programming. I will introduce two methods to you: one is learning programming and the other is learning English. How much money does a learning method like this sell on the Internet? Here

I believe many people have noticed the concept of target in xcode. this is reflected in many places. For example, after opening a project, there is a targets item in the list on the left, and in the top menu of the Project interface, there are also multiple projects that involve the target, so what is the target? Apple

The point to note here is that the interface we're talking about actually includes a discussion of the two aspects of "interface" (interface) and "connectors" (connector), which we often call "connectors" or "plugs." "Interface" defines the physical characteristics of the connection between electronic devices, including the frequency and intensity of the transmitted signal, the type and quantity of the corresponding connection, and the structural desi

independent virtual server. Decoupling and automation through server virtualization can also make virtual networks have these features through network virtualization. What is the network? Virtual machines supporting applications often need to be able to connect to other virtual machines and the external world (WAN/Internet) securely and load balancing networks (switching and routing ). The first network de

JNDIJava Naming and Directory Interface is an important specification in the J2EE specification. Many experts believe that they have not thoroughly understood the significance and role of JNDI, no real knowledge of J2EE, especially EJB.So what is the role of JNDI?To understand the role of JNDI, we can refer to "What sh