Cassandra

Commands

sudo nodetool status cqlsh

Install Via Kubernetes

• https://docs.portworx.com/portworx-install-with-kubernetes/application-install-with-kubernetes/cassandra/#installation
• https://kubernetes.io/docs/tutorials/stateful-application/cassandra/

Install Centos7

http://cassandra.apache.org/download/

or using datastax distro

https://www.howtoforge.com/tutorial/how-to-install-cassandra-database-on-centos-7/

Cheat Sheet

http://codefoundries.com/developer/cassandra/cassandra-cheatsheet.html

DESCRIBE keyspaces; Detailed list of databases

SELECT * FROM system_schema.keyspaces; Create database rebar suitable for development:

CREATE KEYSPACE rebar WITH replication = {

 'class':'SimpleStrategy',
 'replication_factor' : 1

}; Switch to database rebar:

USE rebar; List of tables:

DESCRIBE tables; List of columns in a table User in database rebar:

SELECT * FROM system.schema_columns WHERE keyspace_name = 'rebar' AND columnfamily_name = 'User'; MANAGE TABLES Create a table:

CREATE TABLE User(

 id uuid PRIMARY KEY,
 username varchar,
 password varchar,
 displayname varchar,
 email varchar,

); Create an index on a column:

CREATE INDEX User_username_ix ON User( username ); List details for table rebar:

DESCRIBE TABLE rebar; MANAGE DATA Insert a record into a table with auto-generated UUID:

insert into User( id, username, password, displayName, email ) values( uuid(), 'jack', 'secret', 'Jack', 'jack@example.com' ); Insert a record into a table with given UUID:

insert into User( id,

 username, password, displayName, email

) values( d362e1df-1fa8-466b-b311-af90b2a71e8e,

 'jack', 'secret', 'Jack Myuser', 'jack@example.com'

); DATA TYPES Type Description ascii ASCII character string bigint 8-byte long blob Arbitrary bytes (no validation) boolean true or false counter Counter column (8-byte long) decimal Variable-precision decimal double 8-byte floating point float 4-byte floating point int 4-byte integer text UTF8 encoded string timestamp Date plus time, encoded as 8 bytes since epoch uuid Type 1, or type 4 UUID varchar UTF8 encoded string varint Arbitrary-precision integer