cassandra

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Apache Cassandra
-----------------

Apache Cassandra is a highly-scalable partitioned row store. Rows are organized into tables with a required primary key.

https://cwiki.apache.org/confluence/display/CASSANDRA2/Partitioners[Partitioning] means that Cassandra can distribute your data across multiple machines in an application-transparent matter. Cassandra will automatically repartition as machines are added and removed from the cluster.

https://cwiki.apache.org/confluence/display/CASSANDRA2/DataModel[Row store] means that like relational databases, Cassandra organizes data by rows and columns. The Cassandra Query Language (CQL) is a close relative of SQL.

For more information, see https://cassandra.apache.org/[the Apache Cassandra web site].

Issues should be reported on https://issues.apache.org/jira/projects/CASSANDRA/issues/[The Cassandra Jira].

Requirements
------------
- Java: see supported versions in build.xml (search for property "java.supported").
- Python: for `cqlsh`, see `bin/cqlsh` (search for function "is_supported_version").


Getting started
---------------

This short guide will walk you through getting a basic one node cluster up
and running, and demonstrate some simple reads and writes. For a more-complete guide, please see the Apache Cassandra website's https://cassandra.apache.org/doc/latest/cassandra/getting-started/index.html[Getting Started Guide].

First, we'll unpack our archive:

  $ tar -zxvf apache-cassandra-$VERSION.tar.gz
  $ cd apache-cassandra-$VERSION

After that we start the server. Running the startup script with the -f argument will cause
Cassandra to remain in the foreground and log to standard out; it can be stopped with ctrl-C.

  $ bin/cassandra -f

Now let's try to read and write some data using the Cassandra Query