Francois Orsini wrote: > Found this related JIRA entry as well: > http://issues.apache.org/jira/browse/DERBY-377 > > from the 2nd link sent by Dan, it seems like we're doing internal > upgrade but it is not automatic. I see that we also allow soft upgrade > which is neat... > > A question I have is when a database is being (non-soft) upgraded, is > it put in single-user mode (or read-only) or not? how are concurrent > DDL/DML handled against that database? (there might not be any issues > - I just haven't seen any restriction(s) mentioned during upgrade as > part of the documentation)
Fully functioning engine in soft upgrade mode, except for the new features that would leave persistent data that would not be understood by an older release. For 10.1 that would be SYNONYMS etc. Ie. multi-user, read/write. The intention is that applications can try out the new engine version with no changes and see if it fixes bugs or improves (or degrades) performance. Dan.
