Hadoop version Problems

Currently, hadoop versions are messy and the relationship between versions is often unclear. Below is a brief summary of the evolution of Apache hadoop and cloudera hadoop versions.

 

The official Apache hadoop version description is as follows:

1.0.x-Current stable version, 1.0 Release

1.1.x-Current beta version, 1.1 Release

2. x. x-Current alpha version

0.23.x-Simmilar to 2. x. x but missing NN ha.

0.22.x-Does not include security

0.20.203.x-Old legacy stable version

0.20.x-Old legacy version

 

From http://blog.cloudera.com/blog/2012/01/an-update-on-apache-hadoop-1-0/

It can briefly describe the changing relationship between Apache hadoop and cloudera hadoop version.

 

Version 0.20.x has finally evolved into version 1.0.x.

Version 0.23.x has finally evolved into the current 2.x version.

Hadoop 1.0 refers to 1.x( 0.20.x), 0.21, 0.22

Hadoop 2.0 refers to 2.x, 0.23.x

Cdh3 and cdh4 correspond to hadoop1.0 hadoop2.0

 

Dong has two blogsArticleIt is also clearly explained that hadoop versions and their respective version features:

Http://dongxicheng.org/mapreduce-nextgen/how-to-select-hadoop-versions/

Http://dongxicheng.org/mapreduce-nextgen/hadoop-2-0-terms-explained/

Finally, we provide common download URLs for different hadoop versions:

Http://archive.apache.org/dist/hadoop/core/

Http://archive.cloudera.com/cdh/3/

Http://archive.cloudera.com/cdh4/cdh/4/

 

In addition, compare the commercial releases of hadoop:

Http://www.xiaohui.org/archives/795.html