Cassandra Installation Guide

and Example

Lecturer : Prof. Kyungbaek KimPresenter : I Gde Dharma Nugraha

Cassandra Environment

• VMWare Player/Oracle VirtualBox• Ubuntu 12.04 LTS• 64bits

• Java• Version 1.7 (Oracle version)

• Cassandra• Version 2.1.2• http://mirror.apache-kr.org/cassandra/2.1.2/apache-

cassandra-2.1.2-bin.tar.gz

Preparing Java

• Java development kit• $sudo add-apt-repository ppa:webupd8team/java• $sudo apt-get update• $sudo apt-get install oracle-java7-installer

• Check success installation, run:• $java –version

• Automatically setting java environment variables• $sudo apt-get install oracle-java7-set-default

Preparing Cassandra Code

• This exercise uses Cassandra 2.1.2• Get apache-cassandra-2.1.2-bin.tar.gz

• $wget http://apache.tt.co.kr/Cassandra/2.1.2/apache-cassandra-2.1.2-bin.tar.gz

• $tar xvf apache-cassandra-2.1.2-bin.tar.gz• $mv apache-cassandra-2.1.2 cassandra

• Run single mode Cassandra• $cd cassandra/bin• $./cassandra –f (running Cassandra in the foreground and

log gratuitously to the console).

• Stop Cassandra• Press “Control-C” in the same window with the command above.

Cassandra Single Mode

• Run single mode Cassandra• $cd cassandra/bin• $./cassandra –f

• Screenshot:

Cassandra Single Mode• Check Cassandra Node• Open new Terminal Window• Type command

• $cd cassandra/bin• $./nodetool status

• Screenshot

Cassandra Multiple Node Mode• Preparation• Make two new VM.• Repeat the step for preparing the environment with Java

7.• Download apache-cassandra-2.1.2-bin.tar.gz and repeat

Cassandra preparation step for each new VM.• Setting the IP for all the VM with the same IP Network to

perform LAN.• For this exercise:

• Node 1 : 192.168.159.128• Node 2 : 192.168.159.129• Node 3 : 192.168.159.130

Cassandra Multiple Node Mode• Configuration for all VM

• Enter conf folder• $cd cassandra/conf• Edit cassandra.yaml and configure with the setting below

• cluster_name: ‘MyCassandraCluster’• num_tokens: 256• seed_provider:

• class_name: org.apache.cassandra.locator.SimpleSeedProvider

• Parameters:• seeds: “192.168.159.128”

• listen_address: 192.168.159.128 or listen_interface: eth0

• rpc_address: 0.0.0.0• broadcast_rpc_address: 192.168.159.128• endpoint_snitch: GossipingPropertyFileSnitch

Cassandra Multiple Node Mode• Run Cassandra in each VM• First empty cassandra/data directory

• $cd cassandra/data• $rm –rf *

• $cd cassandra/bin• $./cassandra -f

Cassandra Multiple Node Mode• This screenshot shows that all nude have UP.

Cassandra Multiple Node Mode• To make sure, run Nodetool command in new

terminal window.• $./nodetool status

Cassandra Interaction

• Interaction with Cassandra, use cqlsh (CQL Shell)• Type command below to run cqlsh• $cd cassandra/bin• $./cqlsh

Practical Example (1)

• Interaction using CQL• Source : http://www.planetcassandra.org• Running cqlsh from installation_tarball/cassandra/bin

directory.

Practical Example (1) Cont’d• Interaction using CQL• Create keyspace then use the new keyspace.

Practical Example (1) Cont’d• Interaction using CQL• Create user table within demo keyspace.

Practical Example (1) Cont’d• Interaction using CQL• Show schema

Practical Example (1) Cont’d• Interaction using CQL• Insert Data

• Select Data

Practical Example (1) Cont’d• Interaction using CQL• Update Data and show the result

• Delete Data

Practical Example (1) Cont’d• Inside Cassandra Data Directory

Practical Example (2)

• Simple Java Application with Cassandra Java Driver• Preparation

• Download Cassandra java driver• $wget

http://downloads.datastax.com/java-driver/cassandra-java-driver-2.1.2.tar.gz

• $tar xvf cassandra-java-driver-2.1.2.tar.gz• $mv cassandra-java-driver-2.1.2 cassandrajava

• Download slf4j• $wget http://www.slf4j.org/dist/slf4j-1.7.7.tar.gz• $tar xvf slf4j-1.7.7.tar.gz• $mv slf4j-1.7.7 slf4j

• Make java file with filename GettingStarted.java

Practical Example (2) Cont’d• Simple Java Application with Cassandra Java Driver• GettingStarted.java

Practical Example (2) Cont’d• Simple Java Application with Cassandra Java Driver• GettingStarted.java

Practical Example (2) Cont’d• Simple Java Application with Cassandra Java Driver• Compile GettingStarted.java

• $javac –classpath $HOME_PATH/cassandrajava/cassandra-driver-core-2.1.2.jar:. GettingStarted.java

• Run GettingStarted• $java –classpath $HOME_PATH/cassandrajava/*:

$HOME_PATH/cassandrajava/lib*:$HOME_PATH/slf4j/slf4j-nop-1.7.7.jar:. GettingStarted

• The Result

Practical Example (3)

• Integrate Hadoop and Cassandra• Integrating Hadoop and Cassandra perform big analytic

tools.• Cassandra will be the data source and Hadoop will be

the processor.• Requirements for integrate Hadoop and Cassandra:

• Isolate Cassandra and Hadoop nodes in separate data centers.• Disable virtual nodes (vnodes)

• Set num_tokens to 1 in the cassandra.yaml file.• Uncomment the initial_token property and set it to 1 or the value

of a generated token for a multimode cluster.• Start the cluster for the first time.

Practical Example (3) Cont’d• Integrate Hadoop and Cassandra

• Preparation• Download source code and library

• $wget https://www.dropbox.com/s/2778132fgjmod2i/CassandraWordCount.tar.gz?dl=0

• $mv CassandraWordCount.tar.gz?dl=0 CassandraWordCount.tar.gz• $tar xvf CassandraWordCount.tar.gz

• Create keyspace in Cassandra, name : test• cqlsh>CREATE KEYSPACE test WITH REPLICATION = { ‘class’ :

‘SimpleStrategy’, ‘replication_factor’ : 2};• cqlsh>USE test;• cqlsh>CREATE TABLE documents(id uuid, content text, primary key

(id));• Insert sample data.

Practical Example (3) Cont’d• Integrate Hadoop and Cassandra• Compile

• $javac -classpath $HADOOP_HOME/hadoop-core-1.0.3.jar:/home/hduser/CassandraWordCount/lib/cassandra-driver-core-2.1.2.jar:/home/hduser/cassandra/lib/*.jar:/home/hduser/CassandraWordCount/lib/cassandra-all-2.1.1.jar -d bin src/WordCount.java

• $cd bin• $jar –cvf wordcount.jar *.class

Practical Example (3) Cont’d• Integrate Hadoop and Cassandra• Run

• Run Hadoop• Run Cassandra• Run apps using command:

• hadoop jar wordcount.jar WordCount -libjar /home/hduser/CassandraWordCount/lib/cassandra-all-2.1.1.jar,/home/hduser/CasssandraWordCount/lib/cassandra-driver-core-2.1.2.jar,/home/hduser/CassandraWordCount/lib/cassandra-thrift-2.0.3.jar,/home/hduser/CassandraWordCount/lib/google-collect-1.0.jar,/home/hduser/CassandraWordCount/lib/jamm-0.2.4.jar,/home/hduser/CassandraWordCount/lib/libthrift-0.9.2.jar,/home/hduser/CassandraWordCount/lib/metrics-core-3.0.2.jar,/home/hduser/CassandraWordCount/lib/netty.jar -Dinput=localhost -Doutput=/user/hduser/out31

Practical Example (3) Cont’d• WordCount mapper

Practical Example (3) Cont’d• WordCount reducer

Practical Example (3) Cont’d• WordCount run

Practical Example (3) Cont’d