Wang Jialin's third lecture on hadoop graphic training course: the process of proving the correctness and reliability of hadoop work requires only four steps

This tutorial is written by Wang Jialin, "the path to a practical master of cloud computing distributed Big Data hadoop-from scratch". Third, it takes only four steps to prove the correctness and reliability of hadoop work.

For details about the PDF version, click here.

Wang Jialin's complete directory of "cloud computing distributed Big Data hadoop hands-on path"

 

Wang Jialin's in-depth case-driven practice of cloud computing distributed Big Data hadoop in July 6-7 in Shanghai

 

 

Wang Jialin summarized his research and practices on hadoop over the past few years, and continuously went deep into the cloud through hands-on practices. Even if it was a practical technology, everyone could learn and benefit from it.

This tutorial is based on Wang Jialin's years of practical research and practice on cloud computing. All the free textbooks are as follows::Cloud computing distributed Big Data hadoop hands-on path (three books in total ):

1. Wang Jialin's "Master road to cloud computing distributed Big Data hadoop practice-from scratch" guides you through easy-to-use hadoop and handles the daily programming work of hadoop engineers, enter the beautiful world of cloud computing and big data.

2. Wang Jialin's "cloud computing, distributed big data, hadoop hands-on approach-master's rise" has taken you directly to the hadoop master realm through hands-on operations on several cases and hadoop advanced topics.

3, wang Jialin's "cloud computing, distributed big data, hadoop hands-on-hand master" helps you reach the top of the master through the mainstream hadoop commercial use methods and the most successful hadoop large cases, from here, we can see all the small mountains.

These tutorials will be gradually released every day over the course of practice. You need more support!

 

For more hadoop communication, contact Jia Lin:

Sina Weibo: http://weibo.com/ilovepains

QQ: 1740415547

QQ: 312494188

Weixin: wangjialinandroid

Official blog: http://www.cnblogs.com/guoshiandroid/

 

 

Question: How Do We Know hadoop?Work is correct and reliable?

Specific lab: Create the "input" directory under the root directory of hadoop HDFS, copy all files suffixed with "sh" in the bin directory of the local hadoop installation package on Ubuntu to the hdfs input directory, run the wordcount tool that comes with hadoop to output the result to the output directory under the root directory of HDFS,Finally, verify ourHadoopCorrectness of Word Count statistics. The specific operations are as follows:

Step 1: create the "input" directory under the root directory of hadoop HDFS:

View the HDFS Web console, and the "input" directory we created is displayed: