Unless your cluster is very small, using the method of adding / removing nodes will eventually result in putting a much larger portion of your dataset on a very few number of nodes. I *highly* discourage this.
The only correct, safe path is Bowen's suggestion of adding another DC and decommissioning the old one. Jon On Thu, May 16, 2024 at 1:37 AM Bowen Song via user < user@cassandra.apache.org> wrote: > You can also add a new DC with the desired number of nodes and num_tokens > on each node with auto bootstrap disabled, then rebuild the new DC from the > existing DC before decommission the existing DC. This method only needs to > copy data once, and can copy from/to multiple nodes concurrently, therefore > is significantly faster, at the cost of doubling the number of nodes > temporarily. > On 16/05/2024 09:21, Gábor Auth wrote: > > Hi. > > Is there a newer/easier workflow to change num_tokens in an existing > cluster than add a new node to the cluster with the other num_tokens value > and decommission an old one, repeat and rinse through all nodes? > > -- > Bye, > Gábor AUTH > >
