Q:

How to remove a node from the seed list in Cassandra without lossing data?

Is there the proper way of how to remove a node from the seed list in Cassandra's cluster? I just want to reduce the seeds list without actual replacing or decomission of a node. Is that possible?

A:

Yes, just remove the particular node from the seed list on all nodes, and either perform a rolling restart, or call nodetool reloadseeds (if you have version of Cassandra that has this subcommand - I don't remember in which version it was introduced...)

