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Label:Online redo log files are used to cycle through all operations of the Oracle database and are almost always read-write, so it is meaningless to back up the online redo log files at some point in time, and to restore them at all. The Rman backup does not have the ability to back up the online redo log at all, and not only Rman, but all backup software does not have the idea of backing up the

Now because everyone's pace of life faster, online shopping more and more people, the internet shopping behavior is more and more frequent. What clothing, tobacco, alcohol, mobile phones, kitchenware, pet food and so on, in addition to some have to personally experience the ability to sell things, almost nothing on the Internet to buy. And online shopping also often have some unexpected harvest, let people

With the increasing scale and demand of online game practitioners, more and more friends have entered the online game development field, which leads to a rapid increase in the demand for online game development technologies in the market. Currently, the online gaming industry is in short supply of "expert" developers w

1. OnLine Operation Mode Off-Line offline mode)Quiescent static mode)On_Line online mode)Shutdown mode)Recovery mode) The OnLine system has the following working modes: Offline mode: OnLine is not running, and shared memory is not allocatedInitialization mode: a transitional mode that occurs during

Online games and standalone games When it comes to online games, we have to think of Single-host games. In fact, the essence of online games cannot be separated from the production idea of Single-host games. The difference between online games and single-host games can be directly thought: is it possible to connect mul

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ObjectiveThe previous article briefly explained the use of Redis to cache online user Logic. Space is also relatively small, this article will be in detail to realize the User's offline notification, image effect conversion Function. In addition, the code and development ideas will be described in Detail.Effect ShowThere are currently three users, user1,user2,user3. will simply show the user on-line, offline message push Effect.Figure One: User 1 logi

I like the "Gossip Terminator" program because I think the challenge he faces is real. In the program, use a delightful and scientific method to test the message that people generally agree with. My favorite part of the show, of course, apart from the exploding part, is that what I believe is proving untrue. It keeps me open and focused on reality. I also like the other side-revealing rumors that have not yet been built up. This is the perspective of my article. In particular, I will highlight f

Online Online shopping website proposal Directory I. Introduction to the Project Two. Overview of market Objectives Three. Project advantages and characteristics of the introduction Four Feasibility of project operation Five. Website construction purpose and business model Six. Website development planning and construction progress Seven. Market and Sales Objective In the current network society, because o

kernel space, and 3 GB is the user space (0 ~ 0xbfffffff user space) (0xc0000000 to 0xfffffff kernel space)8) What are the characteristics of the memory applied for by vmalloc?9) What is the scope of the memory space applied by the user program to use malloc?0 ~ 0 xbfffffff10) in a system that supports and enables MMU, does the Linux kernel and user program run in physical address mode or virtual address mode?Virtual Address Mode11) How many page tab