Cassandra Installation over Ubuntu

1. Installing VMware player:

Download VM Player using following Download Link:

https://www.vmware.com/tryvmware/?p=player

2. Installing Ubuntu

Go to the below link and download the image of ubuntu 12.04 http://www.traffictool.net/vmware/ubuntu1204t.html Open VMware Player and click open virtual machine.

Select path where you have extracted image of Ubuntu. After that select the .vmx file and click Open.

Now you can see the below screen in VMware Player. Click on the PLAY VIRTUAL MACHINE Option shown in the following figure:

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This will redirect you to the Ubuntu Desktop as shown in following figure:

Click on Search and Type Terminal to search.

Select the Terminal Icon to Open Ubuntu Terminal.

Click on SEARCH

Click on Terminal to

Open Terminal.

The below screen shot is the Ubuntu Terminal.

Create a temp folder using the following command:

mkdir ~/temp

Use the following command to get out of temp folder.

cd..

In this temp folder we will keep cassandra files.

3. Installing JAVA:

To update the use following Command:

sudo apt-get update

The above command downloads the package lists from the repositories and

"updates" them to get information on the newest versions of packages and their

dependencies.

To install JAVA use the following Command:

sudo apt-get install openjdk-7-jre-headless

Password for user is password

It will ask the following highlighted option. Answer it as y

Wait till it becomes 100%

To check whether JAVA got installed or not use following command:

java -version

Run the following commands to set JAVA_HOME and PATH:

JAVA_HOME=/usr/local/java/jdk1.7.0_25

PATH=$PATH:$HOME/bin:$JAVA_HOME/bin

JRE_HOME=/usr/local/java/jdk1.7.0_25

PATH=$PATH:$HOME/bin:$JRE_HOME/bin

export JAVA_HOME

export JRE_HOME

export PATH

Use following Commands to make above Paths persistent.

sudo nano /etc/profile

This will redirect you to the following “ /etc/profile file ” as shown in below screen

shot.

The “/etc/profile file” controls system-wide default variables.

Scroll down.

Paste the Command that you used for setting the pathh variables (as

shown in below figure) and save by using the Ctrl+O command and

enter.

The above highlighted part in the The path variables got saved as shown in above

figure.

Close the Terminal.

And open New Terminal for Cassandra Installation.

4. Installing Cassandra

Download the binary files for Cassandra from the Web. Use a location to store (say temp folder) the downloaded file.

cd ~/temp

Use the following address to download the binary files from the Web (or Internet). wget http://www.us.apache.org/dist/cassandra/1.2.11/apache-cassandra-1.2.11-bin.tar.gz

Wait till it gets 100% Done.

Use following Command to untar the tar file:

tar -xvzf apache-cassandra-1.2.11-bin.tar.gz

Use following command to move the untar file to cassandra.

mv apache-cassandra-1.2.11 ~/cassandra

By default, Cassandra uses ” /var/lib/Cassandra” and “/var/log/cassandra” ,

We will check for following key points:

Following are the syntaxes to create data and logging directories needed by

Cassandra.

sudo mkdir /var/lib/Cassandra

sudo mkdir /var/log/cassandra

Username : user Password : password

Following Commands are used to change the Owner and Group setting So, that

Cassandra can easily perform WRITE over these data and logging directories.

sudo chown -R $USER:$GROUP /var/lib/cassandra

sudo chown -R $USER:$GROUP /var/log/cassandra

Now it’s time to set the Cassandra Variables.

Run the following Commands to set the Cassandra Variables.

export CASSANDRA_HOME=~/cassandra

export PATH=$PATH:$CASSANDRA_HOME/bin

Now We will be configuring Cassandra’s per thread stack size to a larger one than

default. That can be done by using following Steps:

Open the cassandra-env.sh file using following command;

nano ~/cassandra/conf/cassandra-env.sh

This will redirect you to the following cassandra environment file:

Scroll the file till you get the following highlited Text:

Change the highlighted text (JVM_OPTS)

to the below shown New values.

Save it using command Ctrl+O

Save Done.

Use Ctrl+X to exit.

5. Running Cassandra

For running the Single-Node Cluster of Cassandra, We will simply run the following

Commands:

(For running the Multi-Node Cluster We have to configure the cassandra.yaml in

according to the cluster setup.)

Start the Cassandra Server by using following Command:

sudo sh ~/cassandra/bin/cassandra

Wait till starts showing “Satrtup completed! Now serving reads.”

Run the Cassandra cli using the following command:

sudo sh ~/cassandra/bin/cassandra-cli

And if you if find that - Connected to: ‘Test Cluster’ as shown in following image:

INSTALLATION DONE!!!!

YOU ARE RUNNING YOUR SINGLE-NODE CASSANDRA CLUSTER.