Some differences between datagram Socket class and Socket in network programming

Socket is a kind of socket based on TCP. It takes a certain amount of time to use each connection. To reduce this cost, there is a second kind of socket: self addressing socket, which uses UDP to send addressing information. The difference is that it can send multiple IP packets. TCP guarantees the information to other information purposes, bu ...

Posted on Sat, 04 Jan 2020 15:21:11 -0500 by php_dave

51 Nod 1134 longest increasing subsequence (dynamic programming basis)

Original question link: 1134 longest increasing subsequence Topic analysis: the length isThe sequence ofUp toSubsequence, but we can still find the longest increasing subsequence very efficiently by using dynamic programming method() Here are two methods. The following variables are considered to design the dynamic programmin ...

Posted on Sat, 04 Jan 2020 15:18:58 -0500 by manmadareddy

Dockerfile build (ssh, systemctl, nginx, tomcat, mysql)

1. Dockerfile Dockerfile is a description file of the mirror file in docker. The straight point is what the mirror file is made up of step by step.For example: You bought a hanger on Taobao, but the seller did not send you a complete hanger, but some components and a drawing. You assemble the hanger step by step according to this drawing, and ...

Posted on Sat, 04 Jan 2020 15:17:16 -0500 by Ace_Online

004 briefly introduce WordCount and count the number of words in the text

MapReduce introduction MapReduce is a distributed computing model, which mainly solves the computing problem of massive data. MR consists of two phases: Map and Reduce. Users only need to implement map() and reduce() functions to realize distributed computing. Schematic diagram of MapReduce MR execution process 2.MR schematic diagram      ...

Posted on Sat, 04 Jan 2020 15:16:38 -0500 by MikeDXUNL

solr advanced query - group and facet

1. overview facet is just a simple statistical record. If you need to obtain doc information, you cannot return the actual data for each group of data. You need to query the actual data again. Group is similar to group by in a relational database. In addition to grouping, you can also return the actual data 2. Query example 2.1 group Query solr ...

Posted on Sat, 04 Jan 2020 15:13:38 -0500 by jellis

RMAN Migration Library in ORACLE10G Non-archiving Mode

Environmental information: Source Library Target Library operating system WIN7 WIN SVR 2012 R2 IP x.x.x.216 x.x.x.112 Database Version 10.2.0.4.0 - 64bi 10.2.0.4.0 - 64bi Storage Single instance Single instance ORACLE_HOME D:\oracle\product\10.2.0\db_1 D:\oracle\product\10.2.0\db_1 ORACLE_SID ORCL ORCL RMAN Recovery Idea Ste ...

Posted on Sat, 04 Jan 2020 15:12:49 -0500 by davidz

Spring cloud spring boot mybatis distributed micro service Cloud Architecture Development Web application (2)

After completing the configuration, take a simple example. Based on the quick start project, take a simple example to render a page through Thymeleaf. @Controller public class HelloController { @RequestMapping("/") public String index(ModelMap map) { // Add a property to read from the template map.addAttribute(" ...

Posted on Sat, 04 Jan 2020 14:58:20 -0500 by nanobots

Kubeflow series: Solve one-click installation of kubeflow based on Ali cloud mirror in China

Environmental preparation kubeflow is very demanding for the environment. See the official requirements:at least one worker node with a minimum of: 4 CPU 50 GB storage 12 GB memory Of course, you can install if you don't, but you will have resource problems later on because this is the full package. A kubernetes cluster is already installed, ...

Posted on Sat, 04 Jan 2020 14:53:15 -0500 by er0x

VUE actual combat - Zhihu daily (2)

Configure basic html,main.js The html code is as follows: just import main.js <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Webpack App</title> <link rel="stylesheet" type="text/css" href="/dist/main.css"> </head> <body> <div id="app"> ...

Posted on Sat, 04 Jan 2020 14:41:18 -0500 by TouranMan

Codeforces 208e blood courses (DSU on tree + multiplier)

Links: http://codeforces.com/problemset/problem/208/E Meaning: now there are several trees. For each query, there is a node u and a K. you need to figure out the number of nodes on this tree that are the same k-level brothers as u, that is, the number of nodes that are the same father as u's k-level father. Idea: for each nod ...

Posted on Sat, 04 Jan 2020 14:06:28 -0500 by Smudly