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install Download Address https://www.elastic.co/cn/dow... install After downloading the installation package, unzip the file: tar -zxvf elasticsearch-7.4.2-linux-x86_64.tar.gz File directory structure Catalog configuration file describe bin Script files, including starting elasticsearch, installing plug-ins, and so on config elasticsea ...

In Java, not all types of information can be identified at the compilation stage. Some types of information need to be determined at runtime. This mechanism is called RTTI. In English, it is called Run-Time Type Identification. Runtime type recognition. Does it taste like "knowing and doing as one"?Runtime type recognition is mainly i ...

11.2.1.2 find service information In addition to the IP address, each socket address includes an integer port number. Many applications can run on the same host and listen to an IP address, but only one socket can use the port of that address at a time. By combining IP address, protocol and port number, a communication ...

1. What is RAID: The full name of the disk array is "Redundant Arrays of Inexpensive Disks, RAID". The English version means: fault-tolerant, inexpensive disk array. RAID can integrate multiple smaller disks into a larger disk device using a single technology (software or hardware); this larger disk function is more than storage; i ...

What should I do when the previous manual operation of running nginx+php in multiple containers was cumbersome?Docker Compose follows Delete the containers and networks you created in the previous section first. If you do not, there will be conflicts when you complete this chapter docker stop nginx docker stop fpm docker network rm lnmp Take ...

Production environment servers slow down, diagnostic thinking, and performance evaluation Entire machine: Code public class JavaDemo2 { public static void main(String[] args) { while (true){ System.out.println(new java.util.Random().nextInt(77778888)); } } } top command view [root@192 ~]# top top - 11:28:5 ...

This article is only a summary of your own, if you need detailed information, please go around. Note: yaml files require strict indentation. By default, two spaces are indented at different levels. 1. Create a Deployment resource object using httpd mirroring [root@master ~]# vim lvjianzhao.yaml #Write yaml file kind: Deployment ...

1. Input man socket into the terminal to check the contents of socket 2. Create socket on the server side /* First parameter domain (network type): pf? INET IPv4 / PF? Inet6 IPv6 The second parameter type (socket type): sock'stream connection oriented -- TCP protocol / sock'dgram connectionless -- UDP protocol The th ...

White paper highlights Before starting to play the library test network, draw the key points in the library white paper, such as how to generate coins, how to trade, etc. Building a simple, borderless currency and financial infrastructure for billions of people The effect is, for example, if you want to go to the United States and need to order ...

The OC version of SDWebimage that I read before is mature due to the development trend of Swift. It's also time to practice (think of Andy Lau's practice), think, read and write while flying in the world. At first, I plan to read it from the beginning, but the Kingfisher version is limited to upgrading with the Swift version, so if you want to ...