> This version is a beta release[1] on the 4.0 series. As always, please > pay attention to the release notes[2] and let us know[3] if you were > to encounter any problem.
A quick followup note to both user and dev groups. Our Beta release guidelines¹ states that there will be no further API changes leading up to 4.0 GA. But we do currently have in place three planned exceptions to this, found in the following tickets: - CASSANDRA-15299 – "CASSANDRA-13304 follow-up: improve checksumming and compression in protocol v5-beta" - CASSANDRA-15234 – Standardise config and JVM parameters - CASSANDRA-13701 – Lower default num_tokens The API changes to these are minimal, and part of the reason these were allowed to slip into the beta phase. For example… * CASSANDRA-15299 only affects those that are using the not yet stabilised v5 native protocol. * CASSANDRA-15234 will introduce cleaner, easier to use, cassandra.yaml settings, but all existing yaml setting names will still work. * CASSANDRA-13701 will change the default num_tokens setting to 16 (from 256), a change that will only impact provisioning of new clusters (because existing clusters must configure any new nodes to use the existing num_tokens value). All three tickets have fixVersion still set to `4.0-alpha` because of this situation. References: [1] https://cwiki.apache.org/confluence/display/CASSANDRA/Release+Lifecycle
