Re: Migrating Cassandra from 3.11.11 to 4.0.0 vs num_tokens

2021-09-04 Thread Jean Tremblay
Great Thank you for the answer and the link! > On 4 Sep 2021, at 11:35, Erick Ramirez wrote: > > It isn't possible to change the tokens on a node once it is already part of > the cluster. Cassandra won't allow you to do it because it will make the data > already on disk unreadable. You'll ne

Re: Migrating Cassandra from 3.11.11 to 4.0.0 vs num_tokens

2021-09-04 Thread Erick Ramirez
It isn't possible to change the tokens on a node once it is already part of the cluster. Cassandra won't allow you to do it because it will make the data already on disk unreadable. You'll need to either configure new nodes or add a new DC. I've answered an identical question in https://community.

Migrating Cassandra from 3.11.11 to 4.0.0 vs num_tokens

2021-09-04 Thread Jean Tremblay
Hi, We are currently running Cassandra 3.11.11 with the default values for num_tokens: 256. We want to migrate to Cassandra 4.0.0 which has default values for num_tokens set to 16. Is it safe to migrate with the default values, i.e. can I leave it set to 16 when migrating to Cassandra 4.0.0 or