Hi Anuj From https://docs.datastax.com/en/latest-upgrade/upgrade/cassandra/upgrdBestPractCassandra.html :
> - Employ a continual upgrade strategy for each year. Upgrades are > impacted by the version you are upgrading from and the version you are > upgrading to. The greater the gap between the current version and the > target version, the more complex the upgrade. > > And I could not find it but historically I am quite sure it was explicitly recommended not to skip a major update (for a rolling upgrade), even if I could not find it. Anyway it is clear that the bigger the gap is, the more careful we need to be. On the other hand, I see 2.2 as a 2.1 + some feature but no real breaking changes (as 3.0 was already on the pipe) and doing a 2.2 was decided because 3.0 was taking a long time to be released and some feature were ready for a while. I might be wrong on some stuff above, but one can only speak with his knowledge and from his point of view. So I ended up saying: Also I am not sure if the 2.2 major version is something you can skip while > upgrading through a rolling restart. I believe you can, but it is not what > is recommended. > Note that "I am not sure", "I believe you can"... So it was more a thought, something to explore for Varun :-). And I actually encouraged him to move forward. Now that Tyler Hobbs confirmed it works, you can put a lot more trust on the fact that this upgrade will work :-). I would still encourage people to test it (for client compatibility, corner cases due to models, ...). I hope I am more clear now, C*heers, ----------------------- Alain Rodriguez - al...@thelastpickle.com France The Last Pickle - Apache Cassandra Consulting http://www.thelastpickle.com 2016-07-13 18:39 GMT+02:00 Tyler Hobbs <ty...@datastax.com>: > > On Wed, Jul 13, 2016 at 11:32 AM, Anuj Wadehra <anujw_2...@yahoo.co.in> > wrote: > >> Why do you think that skipping 2.2 is not recommended when NEWS.txt >> suggests otherwise? Can you elaborate? > > > We test upgrading from 2.1 -> 3.x and upgrading from 2.2 -> 3.x > equivalently. There should not be a difference in terms of how well the > upgrade is supported. > > > -- > Tyler Hobbs > DataStax <http://datastax.com/> >
