Step 1: Create a hadoop user and authorize the hadoop user
(1) In a new Linux system CentOS-7-x86_64-DVD-1708 In the .iso, if the initial user is root and not a hadoop user, then one needs to
Tag: Pseudo
Consistency hash algorithm implementation (pseudo code)
Refer to this blog for the principle of consistent Hash algorithm, and the introduction is more detailed: https://www.cnblogs.com/lpfuture/p/5796398.html
Preset scene: all requests Then, acco
Hadoop pseudo-distribution
The virtual machine creation and basic linux configuration are skipped, and the key configuration for building a pseudo-distributed hadoop cluster on a single node is recorded.
Get the hadoop
Selenium-51Job Automation Test (CSS Selector Select Element)
Log in to 51job,
http://www.51job.com
Enter the search keyword “python”, select the region “Hangzhou” (note that if the location has already selected other regions , To be removed),
Search
Mac deployed Hadoop3 (pseudo-distributed)
Environmental information Operating system: macOS Mojave 10.14.6 JDK: 1.8.0_211 (installation location: /Library /Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home) hadoop: 3.2.1
In “S