skhatri / cassandra-client-ha

cassandra client high availability setup and test

Cassandra Client Behavior

This project stands up a 2-node cassandra cluster with a node each on its own dc - dc1 and dc2.

Start it up with

docker-compose up -d

Documentation

https://docs.datastax.com/en/dseplanning/docs/metricsandalerts.html https://docs.datastax.com/en/developer/java-driver/4.14/manual/core/load_balancing/#cross-datacenter-failover

Build the JAR

gradle clean build

Run the following tasks:

Tests

Option 1

when both are up and one goes down

does not recover

when local DC is down

does not start

Option 2

when both are up and one goes down

does not recover until DC comes up

when local DC is down

does not connect

Option 3

when both are up and one goes down

switches to another dc

when local DC is down

does not initiate connection to remote initially

Option 4

when both are up and one goes down

switches to another dc
recovers when another dc is up

when local DC is down

switches to another dc

Option 5

when both are up and one goes down

when local DC is down

Option 6

when both are up and one goes down

recovers when DC is up

when local DC is down

uses another DC

Option 7

when both are up and one goes down

recovers when DC is up

when local DC is down