Re: Migrating a cluster

2017-05-01 Thread Bhuvan Rawal
+1 to Justin's answer! As an additional step it's always good to run a full repair before deleting data on existing nodes, as there is a possibility of ioexceptions during rebuild. (Things like https://issues.apache.org/jira/browse/CASSANDRA-12830) Also if you are on 3.8+ , you may go for CDC app

Re: Migrating a cluster

2017-05-01 Thread Justin Cameron
Yes - this is the recommended way to migrate to another DC. Before you start the migration you'll need to ensure 1. that the replication strategy of all your keyspaces is NetworkTopologyStrategy (if not, change it to this using ALTER KEYSPACE), and 2. that each of your clients is using the DcAware

Migrating a cluster

2017-05-01 Thread Voytek Jarnot
Have a scenario where it's necessary to migrate a cluster to a different set of hardware with minimal downtime. Setup is: Current cluster: 4 nodes, RF 3 New cluster: 6 nodes, RF 3 My initial inclination is to follow this writeup on setting up the 6 new nodes as a new DC: https://docs.datastax.com