ansible script operation

inventory host list The default host list of ansible is the / etc/ansible/hosts file. The host list can be set manually or generated dynamically through Dynamic Inventory. Generally, the host name uses FQDN vi /etc/ansible/hosts[webserver] ා set group name with square bracketswww1.example.org ා ...

Posted on Mon, 27 Jan 2020 02:12:44 -0800 by wilku

Talk about rocketmq's SequenceProducerImpl

order This article mainly studies rocketmq's SequenceProducerImpl SequenceProducerImpl io/openmessaging/rocketmq/producer/SequenceProducerImpl.java public class SequenceProducerImpl extends AbstractOMSProducer implements SequenceProducer { private BlockingQueue<Message> msgCacheQueue; public SequenceProducerImpl(final KeyValue p ...

Posted on Fri, 24 Jan 2020 09:14:10 -0800 by bull

2. Hive installation tutorial

VX: Data Science Lecture 1. Prepare hive installation package Download the hive installation package according to the 1.1 tutorial 1.1 download hive Download address After opening the download address, click apache-hive-1.2.2-bin.tar.gz as shown below to download 1.2 upload hvie installation package Based on our previous environment installati ...

Posted on Wed, 22 Jan 2020 09:20:36 -0800 by $var

linux big data cluster building -- cloud server hadoop cluster building

Catalog Step 1: hadoop package download Step 2: upload the apache hadoop package and extract it Step 3: modify the configuration file 1 modify core-site.xml 2 modify hdfs-site.xml 3 modify hadoop-env.sh 4 modify mapred-site.xml 5 modify yarn-site.xml 6 modify mapred env.sh 7 modify slaves ...

Posted on Wed, 22 Jan 2020 02:21:33 -0800 by MortimerJazz

Process and key code analysis of Hbase Clinet scan

  1, Hbase Connection 1. What kind of connection is created by   org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(Configuration, ExecutorService, User) //Initialized by ConnectionImplementation by default String className = conf.get(ClusterConnection.HBASE_CLIENT_CONNECTION_I ...

Posted on Mon, 20 Jan 2020 07:51:08 -0800 by manianprasanna

Tomcat basic "three" -- load balancing

Tomcat basic "one" -- WEB TechnologyTomcat foundation II -- Introduction to Tomcat Foundation load balancing The problem of dynamic servers is that the concurrency is too weak, and multiple dynamic servers are often needed to provide services together. How to suppress concurrent Force alloca ...

Posted on Sun, 19 Jan 2020 07:00:50 -0800 by mband2000

Tomcat basic "three" -- load balancing

Tomcat basic "one" -- WEB TechnologyTomcat foundation II -- Introduction to Tomcat Foundation load balancing The problem of dynamic servers is that the concurrency is too weak, and multiple dynamic servers are often needed to provide services together. How to suppress concurrent Force alloca ...

Posted on Sun, 19 Jan 2020 07:01:34 -0800 by SQL Advanced

Spring cloud Alibaba 3. Create a microservice project with openFeign client (ribbon by default) + Nacos registry

Previous: project structure and description In this paper, we build a real project environment of spring cloud Alibaba. Based on the micro service project of nacos, we use openFeign client and the default Ribbon of openFeign to achieve load balancing 1. Environment use of this article Nacos: Registr ...

Posted on Sat, 18 Jan 2020 06:37:36 -0800 by Tyche

SpringBoot access external interface -- tool class

Preface In the actual project development, it is often necessary to call the third party interfaces in their own projects, such as service providers, and then process the returned data. The company I'm practicing in now uses a more native Http request method, which is more complex to implement. Late ...

Posted on Sat, 18 Jan 2020 06:17:29 -0800 by bskauge

About the Use and Configuration of Log4Net

0. Introduction The Log4Net library is an implementation of the Apache log4j framework under the.NET platform and is open source and free of charge.It can output logs to different media in different formats and levels. Official address: http://logging.apache.org/log4net/index.html Log4Net open so ...

Posted on Fri, 17 Jan 2020 18:08:39 -0800 by coffejor