Shulou(Shulou.com)05/31 Report--

This article mainly introduces what the hadoop version has, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

Hadoop has two branches: 0.20.x and 0.23.x. Among them, 0.20.x is the more stable version, and 0.23.x has more new features, but it is relatively unstable.

The one that developed from the 0.20.x branch is: hadoop1.0,CDH3

What developed from the 0.23.x branch is: hadoop-alpha,CDH4

The following details are hadoop1.0, 2.0 and CDH3, CDH4:

Apache Hadoop released the second Alpha version 2.0, version 2.0.2, on October 02, 2012. This version is tested on a 2000-node cluster, and the current work of the development team is to deal with HDFS HA without shared storage, as well as YARN ResourceManager and scheduling improvements (YARN is the next-generation MapReduce implementation).

The top Apache open source project Hadoop released version 1.0.0 on December 27th. Hadoop is a distributed computing platform developed by former Yahoo developer Doug Cutting. Named after Toy Elephant, it has been used by thousands of companies to analyze large amounts of data. Hadoop 1.0.0 mainly fixes bug to improve performance and compatibility. The previous version was 0.20.205.0, and the new version was 0.20.205.1, but developers said that Hadoop was mature and ready for production several years ago, but some customers wanted to see the version number 1.0 before adopting it, so they decided to skip to 1.0.

Cloudera CDH3 is based on hadoop stable version 0.20.2 and integrates many patches (patch)

CDH4 is based on Hadoop0.23, but it uses the new MapReduce, MapReduce2.0, also known as Yarn.

Installation requirements of CDH4: 64-bit Red Hat Enterprise Linux5.7,CentOS5.7,Oracle Linux5.6,32 bit or 64-bit Red Hat Enterprise Linux6.2 and CentOS6.2

0.20.x is the stable version of history.

0.23.x introduced federation and yarn based on the stable version of 0.20.x, but missing NN and HA

1.0.x is the current stable version, but it is similar to the 0.20.x series, except for some optimization improvements.

1.1.x is the beta version

2.0.x is now the alpha version, with the introduction of yarn and federation, this is the same as 0.23.x, and there are NN and HA, but it is based on the stable version of 1.x

Thank you for reading this article carefully. I hope the article "what are the hadoop versions" shared by the editor will be helpful to you. At the same time, I also hope you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.