Programmer Group

1. Course content Today's main contents include: 1,ZooKeeper Core functions of-ZNode data model 2,ZooKeeper Core functions of-Watcher 3,Zookeeper actual combat Application scenario Implementation of actual enterprise case Purpose of enterprise application case: 1,I will realize these needs 2,You should know that some commonly u ...

1, Hive's architecture design and SQL statement review summary 1.1. Data warehouse The definition put forward by Bill Inmon, the father of data warehouse, in his book "Building the Data Warehouse" published in 1991 is widely accepted. (DW for short) (DM) Data Warehouse is a Subject Oriented, Integrated, non volatile and Time V ...

Spark 2.0 has produced a new stream processing framework Structured Streaming, which is a scalable and fault-tolerant stream processing engine built on Spark SQL Engine. Using Structured Streaming, you can perform streaming computing on static data (Dataset/DataFrame) like batch computing. With the continuous arrival of data, Spark SQL Engine w ...

object-oriented Scala's object-oriented thought is consistent with Java's object-oriented thought and concept.The syntax in Scala is different from that in Java, and more functions are added. Scala package Basic syntax: package nameThree functions of Scala package (same as Java) Distinguish between classes with the same nameWhen there ...

These days when I started hadoop, I didn't even mention the installation of hadoop distributed cluster in the video. I started to talk about the concept directly. After thinking about it for a few weeks, I still solved it. There are too many small problems and the data are messy. The blogs speak differently. I have to summarize and find out the ...

Project resource requirements   VMVare15 resource link: https://pan.baidu.com/s/1cVzeKjqu0Cmp4qMRDbFx8Q Extraction code: tdn4   CentOS7 image file link: https://pan.baidu.com/s/14QyfiXYYObdynswJlOoI1g Extraction code: 6cxp   oracle11 Linux version link: https://pan.baidu.com/s/16hWmzGudLjUEpkRzHAOGZw Extraction code: y34w &e ...

1, Spark cluster topology 1.1 cluster scale 192.168.128.10 master 1.5G ~2G Memory, 20 G Hard disk NAT,1~2 Nuclear; 192.168.128.11 node1 1G Memory, 20 G Hard disk NAT,1 nucleus 192.168.128.12 node2 1G Memory, 20 G Hard disk NAT,1 nucleus 192.168.128.13 node3 1G Memory, 20 G Hard disk NAT,1 nucleus 1.2 Spark installation mo ...

1. Cluster distribution file Application scenario We often need to copy the newly created and modified files to the same directory of all nodes. It is not so friendly to execute the scp command once. Basic knowledge (a) rsync command original copy: [root@bigdata801 hadoop-3.3.1]# rsync -av /opt/module/hadoop-3.3.1/ bigdata802:/opt/module/h ...

02 - room reservation system database - user and room reservation data operation Project description With the increasing popularity of online room reservation, the continuous improvement of policies and regulations and the continuous improvement of technical level, online room reservation will become one of the main means of commercial tr ...

1, Introduction to e-commerce business 1.1 e-commerce business process The business process of e-commerce can be illustrated by taking the browsing footprint of an ordinary user as an example. Users click the home page of e-commerce to start browsing. They may find their favorite products through classified query or full-text search. Thes ...