Hi Manish, My understanding from the links you shared is that only upgrading from 4.X to 5.0 is supported. If you are in version 3.11.12 the standard recommendation is to upgrade to 4.1.latest before going to 5.0.
This is not to say that upgrading from 3.11 to 5.0 does not work, it might work but you are on your own since this version was not built with upgrades from 3.X in mind as far as I understand. If you decide to test if upgrading from 3.11 to 5.0 works without problems please share the results back since this can be useful for other users. Thanks, Paulo On Thu, Oct 3, 2024 at 3:30 AM manish khandelwal < manishkhandelwa...@gmail.com> wrote: > Hi All > > We were evaluating the upgrades of Cassandra clusters managed by us to > Cassandra 5.0. It's clear that Cassandra 4.0 to Cassandra 5.0 is supported. > But I am not sure what is the status with respect to upgrading Cassandra > 3.x to Cassandra 5.0. > > Some online resources I found say it is not possible and you should first > jump to Cassandra 4.x. Following resources talk about the upgrade path > > 1. > https://planetcassandra.org/news/top-5-questions-we-re-asked-about-apache-cassandra-r-5-0/ > 2. > https://www.instaclustr.com/blog/top-5-questions-were-asked-about-apache-cassandra-5-0/ > > Also Cassandra 5.0 announcement says, "Upgrading from 4.x to 5.0 has been > designed and tested as an online upgrade, minimizing downtime for your > applications." Here is the link > <https://cassandra.apache.org/_/blog/Apache-Cassandra-5.0-Announcement.html> > . > > Meanwhile there is a slack discussion > <https://the-asf.slack.com/archives/CJZLTM05A/p1726630791029329> based on > which my understanding is that there should not be an issue for upgrading > to Cassandra 5.0 from Cassandra 3.x. > > I tried upgrading path (3.11.12- -> 5.0.0) using ccm but ccm seems to not > allow me to change the JAVA version on one node and is picking the > JAVA_HOME set on the machine. > > It would be of great help if somebody could confirm if Cassandra upgrade > from 3.11.x to 5.0.0 is supported or not? > > Regards > Manish >
