Machine Learning Model Training Scheme in Mass Data Scenarios

It is very difficult to train the machine learning model by single point in the process of actual processing and solving the engineering problem of machine learning.These scenarios include online recommendations, CTR estimates, Lookalike marketing, and so on. When there are hundreds of millions of data, tens of thousands of dimensional features ...

Posted on Mon, 11 May 2020 23:50:09 -0400 by les48

Source code interpretation of SLF4J binding log implementation principle

1, Guide reading When we use the log4j framework, we often use the slf4j API. When running, you often encounter the following error prompts: SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/Users/abc/maven-repository/org/slf4j/slf4j-simple/1.7.26/slf4j-simple-1.7.26.jar!/org/slf4j/impl/Static ...

Posted on Mon, 11 May 2020 04:50:55 -0400 by fahrvergnuugen

Apache(httpd) source installation

pache is the name of a foundation. httpd is the package we want to install. In the early days it was called apache. Apache's official website www.apache.org Because the Apr libraries used by httpd2.2 and httpd2.4 are different, and the Apr that comes with centos7 does not match them, you need to install the Apr lib ...

Posted on Sun, 10 May 2020 12:26:31 -0400 by psymonic

Analysis of Hadoop YARN ResourceManager crash caused by data limit of ZooKeeper node

This problem makes us encounter again. It happens infrequently, but once it happens, it will cause resource manager service crash, ZK registration watch too many and other problems. It has always been a hindrance to not completely solve this problem, so based on the previous two times of analysis and reading the latest version of Hadoop 3.2.1 c ...

Posted on Sun, 10 May 2020 10:38:53 -0400 by FireWhizzle

Several ways of reading and writing spark articles by HBase

1. Overview of how HBase is read and written It is mainly divided into: The way pure Java API s read and write HBase s; How Spark reads and writes HBase s; How Flink reads and writes HBase s; HBase is read and written through Phoenix; The first is the more original and efficient operation mode provided by HBase itself. The second and ...

Posted on Sat, 09 May 2020 23:05:48 -0400 by israfel

scala and java mixed development package

How to package the mixed development of scala and java? First, create maven project and add dependency in pom.xml <properties> <java.version>1.8</java.version> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <junit.version>3.8.1</junit.version> <slf4j-api.version>1 ...

Posted on Sat, 09 May 2020 10:19:27 -0400 by SueHubert

How to optimize Tomcat performance in high concurrency environment? You will understand after reading it!

Yunqi information:[ Click to see more industry information]Here you can find the first-hand cloud information of different industries. What are you waiting for? Come on! As the most commonly used Java Web server, Tomcat's performance will drop sharply with the increasing concurrency. Is there any way to optimize the performance of Tomcat ...

Posted on Sat, 09 May 2020 04:21:50 -0400 by bstruss

Java automation test framework-05 - to make up the whole shape of your test report

From: https://www.cnblogs.com/du-hong/p/11697592.html brief introduction Through the explanation and sharing of Hongge, I think that my friends and children's shoes have seen the test report generated by the testng framework, and I don't dare to let you compliment it for its appearance and appearance. Today, Hongge will be a beautician, and ...

Posted on Sat, 09 May 2020 04:00:09 -0400 by BuckeyeTheDog

Use of Maven (dependency conflict)

1.1Maven coordinate Coordinates: each jar package or maven project has a unique ID card on the network Coordinates (GAV) Reverse order of groupId company or organization domain name (warehouse: package name) artifactId project name or module name (warehouse: project name) Version version number (warehouse: version number) Is ...

Posted on Thu, 07 May 2020 08:10:28 -0400 by graham

Java build tools Maven and Gradle

What is a build tool? A build tool is a program that automates the process of generating executable applications from source code. Build includes compiling, linking, and packaging code into usable or feasible forms. Two popular building tools Maven: a. You know where the code is, where it's goingb. Have life cycle: can automatically e ...

Posted on Tue, 05 May 2020 20:20:41 -0400 by Fearsoldier