See the "backward compatibility" section here: https://cwiki.apache.org/confluence/display/ZOOKEEPER/ReleaseManagement
The on disk format hasn't changed in some time, although that doesn't mean you can always downgrade. For example if you use new functionality based on new transaction types that the old server version doesn't recognize. Doesn't happen that frequently but it has happened. Patrick On Mon, Sep 12, 2016 at 12:41 AM, Jens Rantil <[email protected]> wrote: > Somewhat related; If something goes wrong, can one downgrade? Is there a > policy for that? Is backwards/forward compatability documented somewhere? > > Thanks, > Jens > > On Monday, September 12, 2016, Patrick Hunt <[email protected]> wrote: > >> Hi Allen. I don't believe there is anything in the docs however there >> is something in the FAQ: >> >> What are the options-process for upgrading ZooKeeper? >> https://cwiki.apache.org/confluence/display/ZOOKEEPER/FAQ >> >> Patrick >> >> On Thu, Sep 8, 2016 at 2:58 PM, allen chan <[email protected] >> <javascript:;>> wrote: >> > Hello everyone, >> > >> > I am reading through the admin guide. I cannot find any section speaking >> of >> > upgrades. Is it documented anywhere the procedure for upgrades and >> anything >> > to look out for upgrading between versions? I am specifically trying to >> go >> > from 3.4.8 to 3.4.9 but curious about overall strategy and information. >> > >> > Thanks >> > >> > -- >> > Allen Michael Chan >> > > > -- > Jens Rantil > Backend engineer > Tink AB > > Email: [email protected] > Phone: +46 708 84 18 32 > Web: www.tink.se > > Facebook <https://www.facebook.com/#!/tink.se> Linkedin > <http://www.linkedin.com/company/2735919?trk=vsrp_companies_res_photo&trkInfo=VSRPsearchId%3A1057023381369207406670%2CVSRPtargetId%3A2735919%2CVSRPcmpt%3Aprimary> > Twitter <https://twitter.com/tink>
