Asciinema Console Demo Script

gistfile1.txt

*********************************

### Step one:  bring up the cluster

asciinema rec

docker run --name Node_X -d scylladb/scylla

docker exec -it Node_X nodetool status

docker run --name Node_Y -d scylladb/scylla --seeds="$(docker inspect --format='{{ .NetworkSettings.IPAddress }}' Node_X)"

docker exec -it Node_Y nodetool status

docker run --name Node_Z -d scylladb/scylla --seeds="$(docker inspect --format='{{ .NetworkSettings.IPAddress }}' Node_X)"

docker exec -it Node_Z nodetool status

<CTRL + D>



*********************************

### Note:  Step two:  Switch on tracing, create a new keyspace, switch to the keyspace, write with **CL=ALL** and read with **CL=QUORUM**

asciinema rec

docker exec -it Node_Z cqlsh

CREATE KEYSPACE mykeyspace WITH REPLICATION = { 'class' : 'SimpleStrategy', 'replication_factor' : 3 };

use mykeyspace

### WRITE CL = ALL

CONSISTENCY ALL

CREATE TABLE users(user_id int PRIMARY KEY, fname text, lname text);
TRACING ON
insert into users (user_id , fname, lname) values (1, 'tzach', 'livyatan'

### WRITE CL = QUORUM
CONSISTENCY QUORUM
insert into users (user_id , fname, lname) values (2, 'john', 'hammink');

### READ CL = QUORUM
select * from users where user_id = 1;
<CTRL + D>


**********************************


### Step three:  take a single node down, check status with ``nodetool``, attempt a write with different consistency levels

asciinema rec

docker stop Node_Y

sudo docker exec -it Node_Z nodetool status

docker exec -it Node_Z cqlsh

use mykeyspace;


#### WRITE CL = ALL (fail)

CONSISTENCY ALL

insert into users (user_id , fname, lname) values (3, 'dor', 'laor');


#### WRITE CL = QUORUM  (maybe fail, maybe succeeds)

CONSISTENCY QUORUM

insert into users (user_id , fname, lname) values (4, 'philip', 'pribble');

<CTRL + D>





*********************************


### Step four:  2 nodes down, read and write with **QUORUM** and **One** consistency levels

asciinema rec

docker ps -a

docker stop Node_X

docker ps -a  # Verify that there are two nodes down

docker exec -it Node_Z nodetool status

docker exec -it Node_Z cqlsh

#### WRITE CL = QUORUM (fail)

CONSISTENCY QUORUM

use mykeyspace;

insert into users (user_id , fname, lname) values (5, 'snarf', 'johnson');


#### WRITE CL = ONE

CONSISTENCY ONE

insert into users (user_id , fname, lname) values (6, 'eric', 'cartman');

#### READ CL = ONE

select * from users;

select * from users where user_id = 1;

<CTRL + D>

******************************************
##Environment:
##Clean up environment:
docker stop $(docker ps -a -q)  && docker rm $(docker ps -a -q)

##Or delete row
cqlsh:mykeyspace> DELETE FROM users where user_id = 6;
##Or Drop table
cqlsh:mykeyspace>  drop table users;  
##Or drop keyspace
use system;
DROP KEYSPACE mykeyspace;