1, Concept understanding
Master-slave structure: in a cluster, some nodes will act as the master server, and other servers will act as slave servers. At present, this architecture mode is called master-slave structure.
Classification of master-slave structure:
1. One master and many slaves
2. Multi master and multi slave
HDFS and YARN in H ...
Posted by fullyscintilla on Mon, 04 Apr 2022 16:37:28 +0300
the core of Flink processing mechanism is "stateful streaming computing". We have also mentioned "state" many times in previous chapters. Whether it is simple aggregation, window aggregation or the application of processing functions, there will be state. Previously, we have briefly introduced stateful flow p ...
Posted by freakyG on Sun, 03 Apr 2022 13:47:02 +0300
hadoop deployment document
Introduction to hadoop
What is hadoop
1) Hadoop is a distributed system infrastructure developed by the Apache foundation.
2) It mainly solves the problems of massive data storage and massive data analysis and calculation.
3) In a broad sense, Hadoop usually refers to a broader concept - Hadoop ecosystem.
Posted by php_joe on Fri, 01 Apr 2022 17:37:55 +0300
Personal interface for the back end of the whole stack project
I think it is necessary to understand some concepts in advance
Install mongoDB Library
npm i mongodb
Install a mongodb Library
// If the database address is not changed, it is the default address
const url = "mongodb://localhost:27017";
Posted by goodrunb on Thu, 31 Mar 2022 11:06:18 +0300
Video address: https://www.bilibili.com/video/av92215954/ Document address: https://files.alicdn.com/tpsservice/e4356097e11364edadb5627a892ee53b.pdf
Application scenario of Join
Exposure related clicks are involved in almost all company apps; Dimension splicing between two streams of data; Widen the watch, etcIn the e-commerce scenario, t ...
Posted by Sharif on Wed, 30 Mar 2022 12:15:51 +0300
Because sql statements are not case sensitive, all commands in this article use lowercase for convenience
day 01 first knowledge of Mysql and DDL data definition languageday 02 DML data operation languageday 03 DQL data query language -- a first glimpseday 04 DQL data query language - single table query - a slight succ ...
Posted by kampbell411 on Tue, 29 Mar 2022 07:33:25 +0300
This article uses Ambari's kafka to configure kafka manager.
CDH and open source can follow the same steps.
kafka is the to enable kerberos authentication.
Kafka manager function
First, let's take a look at the role of Kafka Manager:
Manage multiple clusters
Easily check cluster status (subject, consumer, offset, ag ...
Posted by jdbfitz on Mon, 28 Mar 2022 09:49:32 +0300
Java master Sutra: Java Web core framework (application framework volume)
Author: edited by Liu zhongbing Java Research Laboratory
This book first analyzes the hierarchical design method of Java Web application, selects the application framework, and then explains various Java Web application framewo ...
Posted by DoddsAntS on Sun, 27 Mar 2022 21:14:43 +0300
This tutorial is just a tour of the basic methods used by Maplotlib
In the next chapter, we'll take an advanced tutorial
1. Why use plt. Gcf(). Set_ PLT after facecolor (np.ones(3)* 240/255). Figure will fail. 2.
Matplotlib. Introduction to pyplot
Matplotlib is Python's drawing library. It works with NumPy, providing an ef ...
Posted by Muppet9010 on Sun, 27 Mar 2022 20:15:51 +0300
Introduction to Hive Engine
Hive engines include: default MR, tez, spark
The bottom engine is MR (Mapreduce), which doesn't need to be configured. Hive runs with it
Hive on Tez configuration: https://blog.csdn.net/weixin_45417821/article/details/115181000
Hive on Spark: Hive is responsible for both storing metadata and parsing and optim ...
Posted by r4ck4 on Sun, 27 Mar 2022 20:02:20 +0300