If you're running Cassandra 3.x, the only data file requirement is that all SSTables present on your cluster are 3.x-era SSTables.
This means that you should/should have run upgradesstables at least once on Cassandra 3.x after upgrading from an earlier release before upgrading to Cassandra 4.0. This is necessary because Cassandra 4.0 cannot read the legacy Cassandra 2.x SSTable format. In the same vein, it's not necessary to run upgradesstables after upgrading from Cassandra 3.x to Cassandra 4.0 as 4.0 is able to read 3.x's data format fine. At a later time in the future, it may be necessary to run upgradesstables prior to upgrading to confirm there are no 3.x SSTables left -- but no such post-4.0 SSTable format changes have been proposed yet. ________________________________________ From: Adam Scott <adam.c.sc...@gmail.com> Sent: Wednesday, July 28, 2021 2:58 PM To: user@cassandra.apache.org Subject: Re: [RELEASE] Apache Cassandra 4.0.0 released Thanks Brandon! Anyone know the upgrade path from 3.x? https://cassandra.apache.org/doc/latest/cassandra/getting_started/installing.html Doesn't look like it has specific upgrade instructions. For instance do we need to run nodetool upgradesstables? TIA On 2021/07/26 20:03:59, Brandon Williams <dri...@gmail.com> wrote: > The Cassandra team is pleased to announce the release of Apache > Cassandra version 4.0.0. > > Apache Cassandra is a fully distributed database. It is the right > choice when you need scalability and high availability without > compromising performance. > > http://cassandra.apache.org/ > > Downloads of source and binary distributions are available in our > download section: > > http://cassandra.apache.org/download/ > > This version is the initial release in 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. > > Enjoy! > > [1]: CHANGES.txt > https://gitbox.apache.org/repos/asf?p=cassandra.git;a=blob_plain;f=CHANGES.txt;hb=refs/tags/cassandra-4.0.0 > [2]: NEWS.txt > https://gitbox.apache.org/repos/asf?p=cassandra.git;a=blob_plain;f=NEWS.txt;hb=refs/tags/cassandra-4.0.0 > [3]: https://issues.apache.org/jira/browse/CASSANDRA >
