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1, Kafka is what. Kafka, a distributed publish/subscribe-based messaging system developed by LinkedIn, is written in Scala and is widely used for horizontal scaling and high throughput rates. 2. Create a background Kafka is a mes

We open the Alipay 9.0 main interface as shown below there will be a member privilege, and then we click on the privileges of members to see what privileges. What is the public member of Alipay? In fact, Alipay is a member of the new membership system, there

The index database introduces the most frequent operation of the index user to the database is the data query. In general, a database needs to search the entire table for a query operation. When the data in the table is very large, it takes a long time to search the data, which causes the server to waste resources. In order to improve the ability of retrieving data, the indexing mechanism

A process is a running activity of a program with certain independent functions about a data set.The difference between a process and a program:1, the program is an ordered set of instructions, is a static concept, its ability does not have any meaning of operation. The process is a process in the process of processing

What is a thread? What is the difference between it and the process? Why multithreading ?, Multi-thread A thread is an execution unit in which the program code can be executed during execution. In Java, a thread has four states: running, ready, suspended, and ended. A proces

Windows 10 contains 7 versions: 1, Windows 10 Home Edition (Windows House): mainly for consumers and personal PC users of the computer system version, suitable for personal or home computer users recommend. As a successor to Internet Explorer, the new Edge browser will be responsible for all web browsing tasks, and the continuum feature can automatically fit the user interface according to the current working mode of the deformable device. In addit

Source: http://blog.163.com/lzxin_2005/blog/static/15368423200826104042609/ Most software personnel should be not unfamiliar with UML, what is UML. It is unified modeling Language, a modeling language that is a powerful tool for requirements analysis and outline design. In your understanding,

comments from some netizens in my previous blog post, which is also one of my original intentions in this article. Turning-key does not mean copying and paste delivery by others, rather than calling engineers to build several mobile phones. Instead, it is increasingly a system project that tests the overall layout of the entire company, it needs to rise to the l

method we have introduced to use and describe more devices and objects, and there is nothing special about it. B. What is Lun? Lun ID is not equal to a device, but a number. It does not represent any physical attribute. In our actual environment, the Lun we encounter may be a disk space or a tape drive, or media chang