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Displaying posts with tag: Cassandra DBA (reset)
May
17
2018
Cassandra on Fedora 27
Posted by Michael McLaughlin on Thu 17 May 2018 06:38 UTC
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The last time that I installed Cassandra was on a version of Fedora 20. So, I new the first thing to check was the installation of Java. You can check the Java installation with two statements on a fresh installation of Fedora 27. You need to check the Java runtime and then the Java Software Development Kit before installing, starting, and using Cassandra.

Installing Prerequisites

You check the Java runtime with this command: 

java -version

It should return: 

openjdk version "1.8.0_171"
OpenJDK Runtime Environment (build 1.8.0_171-b10)
OpenJDK 64-Bit Server VM (build 25.171-b10, mixed mode)

You check the Java Software Development Kit (JSDK) with this command: 

javac -version

It should return: 

javac 1.8.0_171

After verifying the Java and JSDK installation, you can install the Cassandra packages with the following yum command as the …

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Jul
30
2017
Cassandra Query Language
Posted by Michael McLaughlin on Sun 30 Jul 2017 06:33 UTC
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After installing Cassandra and reading Cassandra The Definitive Guide, it struck me that I should learn a bit more about the Cassandra Query Language (CQL). So, after I setup a single-node environment and created a .bashcassandra environment file to connect as a student user to the Cassandra instance: 

# Add the Java and JRE paths to the $PATH environments.
export set PATH=$PATH:/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.45.x86_64:/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.45.x86_64/jre

# Add the $JAVA_HOME and $JRE_HOME environment variables.
export set JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.45.x86_64/
export set JRE_HOME=/usr

Having started Cassandra as the cassandra user, I connected to the Cassandra Query Language Shell (cqlsh) …

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