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Intro to cassandra

This repository provides a docker-compose needed to start a 3 node cassandra cluster

Starting the cluster in detached mode

$ git clone https://github.com/eSolutionsGrup/cassandra-intro.git

$ cd cassandra-intro

$ docker-compose up -d

Get container name with docker ps and execute cqlsh interactively

$ docker exec -ti {container_name} cqlsh

Create keyspace

CREATE KEYSPACE bdwvideo WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '1'} AND durable_writes = true;
use bdwvideo;

Create users tables

CREATE TABLE user_credentials(
email text,
password text,
userid uuid,
primary key (email)
);

CREATE TABLE users(
userid uuid,
firstname text,
lastname text,
email text,
created_date timestamp,
primary key (userid)
);

Insert into users table

INSERT INTO users (userid , firstname , lastname , email , created_date) VALUES  ( uuid(),'john','doe','john@doe', '2021-10-09');

SELECT uuid from users;

UPDATE users set lastname='Johnson' where userid = ;

SELECT userid from users;

UPDATE users set lastname='Johnson' where userid = a62485ed-f11d-485e-bd24-14b25a5ba0ff;

);

Create videos tables

CREATE TABLE videos(
videoid uuid,
userid uuid,
name text,
description text,
location text,
location_type int,
preview_image_location text,
tags set<text>,
added_date timestamp,
primary key (videoid)
);

CREATE TABLE  user_videos(
userid uuid,
added_date timestamp,
videoid uuid,
name text,
preview_image_location text,
primary key (userid, added_date, videoid)
) with clustering order by (
added_date desc,
videoid asc);

Create / insert into latest videos tables

CREATE TABLE  latest_videos(
video_date text,
added_date timestamp,
videoid uuid,
name text,
preview_image_location text,
primary key (video_date, added_date, videoid))
 with clustering order by (added_date desc, videoid asc);

insert into latest_videos ( video_date , added_date , videoid , name , preview_image_location ) VALUES ( '2021-10-12', toTimestamp(now()), uuid(),'best name','best preview');

insert into latest_videos ( video_date , added_date , videoid , name , preview_image_location ) VALUES ( '2021-10-12', toTimestamp(now()), uuid(),'best name','best preview');
insert into latest_videos ( video_date , added_date , videoid , name , preview_image_location ) VALUES ( '2021-10-12', toTimestamp(now()), uuid(),'best name','best preview');

Create / insert / query into latest videos bucketed tables

CREATE TABLE  latest_videos_bucketed(
video_date text,
bucket int,
added_date timestamp,
videoid uuid,
name text,
preview_image_location text,
primary key ((video_date, bucket), added_date, videoid))
 with clustering order by (added_date desc, videoid asc);


insert into latest_videos_bucketed ( video_date ,bucket, added_date , videoid , name , preview_image_location ) VALUES ( '2021-10-12',0, toTimestamp(now()), uuid(),'best name','best preview');

insert into latest_videos_bucketed ( video_date ,bucket, added_date , videoid , name , preview_image_location ) VALUES ( '2021-10-12',1, toTimestamp(now()), uuid(),'best name','best preview');


select * from latest_videos_bucketed where video_date = '2021-10-12' and bucket in (0,1);

select * from latest_videos_bucketed where video_date = '2021-10-12' and bucket = 0;
select * from latest_videos_bucketed where video_date = '2021-10-12' and bucket = 1;

Stress test

https://cassandra.apache.org/doc/latest/cassandra/tools/cassandra_stress.html