How to install NOSQL cassandra DB in ubuntu and debian via ppa repository

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Cassandra is a distributed database with a BigTable data model running on a Dynamo like infrastructure. It is column-oriented and allows for the storage of relatively structured data. It has a fully decentralized model; every node is identical and there is no single point of failure. It’s also

extremely fault tolerant; data is replicated to multiple nodes and across data centers. Cassandra is also very elastic; read and write throughput increase linearly as new machines are added.

Cassandra was open sourced by Facebook in 2008, where it was designed by Avinash Lakshman (one of the authors of Amazon’s Dynamo) and Prashant Malik ( Facebook Engineer ). Now it is in production use at Rackspace, Digg, Facebook, Twitter, Cisco, Mahalo, Ooyala, and more companies that have large, active data sets. The largest production cluster has over 100 TB of data in over 150 machines.

To install Cassandra on Debian or other Debian derivatives like Ubuntu, LinuxMint…, use the following:

1- First upgrade your software :

sudo apt-get upgrade

2- Now open sources.list

sudo vi /etc/apt/sources.list

3- add the following lines to your source.list

deb http://www.apache.org/dist/cassandra/debian unstable main

deb-src http://www.apache.org/dist/cassandra/debian unstable main

4- Run update

sudo apt-get update 

Now you will see an error similar to this:

GPG error: http://www.apache.org unstable Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY F758CE318D77295D

This simply means you need to add the PUBLIC_KEY. You do that like this:

gpg –keyserver wwwkeys.eu.pgp.net –recv-keys F758CE318D77295D
gpg –export –armor F758CE318D77295D | sudo apt-key add -

5- Run update again and install cassandra

sudo apt-get update && sudo apt-get install cassandra

6- Now start Cassandra :

sudo /etc/init.d/cassandra start

Note :

-By default, Cassandra uses 7000 for cluster communication, 9160 for clients (Thrift), and 8080 for JMX. These are all editable in the configuration file or bin/cassandra.in.sh (for JVM options). All ports are TCP

- The configuration files are located in /etc/cassandra

Find more on : http://wiki.apache.org/cassandra/

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