Linux speed start
This article mainly records the entry-level basic operation methods in Linux, and arranges the basic Linux operation statements File view pwd lists the path of the current directory and views the current directory [root@localhost ~]# pwd /root ~Represents the user's home directory ls lists allUTF-8...
Posted by donturo on Mon, 20 Sep 2021 10:31:13 +0530
Flink DataStream API usage (including instances)
This article is mainly to familiarize yourself with the functions and use of Flink DataStream related API s through code practice. Readers can complete the exercises together after completing simple preparations get ready A Linux or MacOS computer with Docker. Start the container using Docker CUTF-8...
Posted by mortal991 on Wed, 22 Sep 2021 06:25:01 +0530
Basic database operation (Advanced)
1, Database Constraints Constraint type: NOT NULL: indicates that a column cannot store NULL values (required) UNIQUE: ensure that each row of a column must have a UNIQUE value (it cannot be repeated with other records. If it is repeated, an error will be reported!) DEFAULT: Specifies the DEFAUUTF-8...
Posted by alemapo on Wed, 22 Sep 2021 07:55:48 +0530
Hadoop standalone installation
The installation process of hadoop stand-alone version is as follows: Create a user to manage hadood (you can create a new user or use an existing user)Install and configure ssh password free loginInstalling the Java environmentDownload hadoop and configure environment variablesConfigure the reUTF-8...
Posted by jrottman on Thu, 23 Sep 2021 07:33:33 +0530
Hadoop Learning Notes - Environment setup, step by step, starting with creating a Linux system!
Hadoop environment (for learning purposes only, please specify the source for reprinting) Running environment: VMWare, CentOS7, JDK1.8, Hadoop2.7.3 A download address for the package is provided at the end of the article. 1.Creating a Linux System with VMware Click File-New Virtual Machine-DefaUTF-8...
Posted by rwoods on Thu, 23 Sep 2021 23:21:07 +0530
[Hard Java Concurrency] JAVA Multithreading: Communication Foundation for Thread Communication Threads
This article is about Learning Guide for Big Data Specialists from Zero (Full Upgrade) Java concurrency supplement for. 1 Communication method 1.1 wait() and notify() and notifyAll() wait(): Make the current thread suspend and discard CPU, synchronize resources and wait so that other threads caUTF-8...
Posted by ag3nt42 on Thu, 23 Sep 2021 23:52:07 +0530
Chapter IV Kafka related affairs
1, Offset automatic control Kafka consumer defaults to the offset of unsubscribed topic, that is, the system does not store the record information of the consumer's consumption partition. By default, Kafka consumer's default first consumption strategy: latest (latest) auto.offset.reset=latest aUTF-8...
Posted by craigw9292 on Fri, 24 Sep 2021 17:56:19 +0530
Apache Hadoop Linux Installation and deployment
Hadoop introduction Hadoop is an open source software framework implemented in java language under Apache. It is a software platform for developing and running large-scale data processing. It allows distributed processing of large data sets on a large number of computer clusters using a simple UTF-8...
Posted by BahBah on Sat, 25 Sep 2021 13:24:29 +0530
Elasticsearch: use Path Hierarchy Tokenizer to search the hierarchy
This article describes how to solve a common problem, which is usually called by using Elasticsearch Path hierarchy tokenizer To view different solutions through parent / child relationships or recursive relationships. What use cases can you solve with this override? Before we delve into it, leUTF-8...
Posted by VTS on Mon, 27 Sep 2021 08:04:30 +0530
zookeeper Learning Tutorial
Zookeeper Learning Tutorial Getting started with Zookeeper Summary Zookeeper is an open source, distributed Apache project that provides coordinated services for distributed applications. Zookeeper understands from the design mode perspective that it is a distributed service management frameworUTF-8...
Posted by dirTdogE on Mon, 27 Sep 2021 22:22:34 +0530