FWIW, I've recently upgraded from 2.1 to 3.0 without issues of any sort, but admittedly I haven't been using anything too fancy.
Cheers, Stefano On Wed, Jul 13, 2016 at 10:28 PM, Alain RODRIGUEZ <arodr...@gmail.com> wrote: > 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/> >> > >
