gitter-badger/cagrr

Cassandra partial range repair in Go

cassandra-go-range-repair

Cassandra partial range repair in Go

Anti-entropy Cassandra cluster tool

Prerequisites

1. nodetool installed (on your host)
2. OR mx4j interface activated (on cassandra node)
3. OR jolokia agent installed (on cassandra node)

You may control connection type via -c flag, default connector is mx4j.

Setup test environment

Initialize test Cassandra 2.2 cluster (you need ansible, docker and docker-compose installed):

make setup

Run tests:

make test   # Make a "hole" and check existence

make check  # Only check, no write/restart cycle

Repair your cluster:

make run

Analyze your logs in Kibana interface available at:

http://172.16.237.50:5601

Check your metrics in Grafana interface available at:

http://172.16.237.30:3000

##Troubleshooting

1. Elasticsearch didn't start with vm.max_map_count error:

   Run on your host machine:

   sudo sysctl -w vm.max_map_count=262144