Hello Amir,
(c) Why would the dNFS version differ? IIRC, dNFS is completely an Oracle
implementation over network calls. So, dNFS code shouldn't differ just
because the OS version jumped a notch, I think. However, kNFS client
version might differ a bit, which *might* be a problem if you access
through kNFS such as File system based backups.
Either way, the risk is lower with dNFS for your specific question.
So, I don't foresee any technical issues of running the nodes with
slightly different OS version for a short period of time. However, I may be
concerned with running in that configuration for a prolonged period of
time, following a cautious approach[ fear of unknown issues?]. Of course,
if you can test the process in a non-prod environment, you can completely
eliminate the risk of unknown :)
Cheers
Riyaj Shamsudeen
Principal DBA,
Ora!nternals - http://www.orainternals.com - Specialists in Performance,
RAC and EBS
Blog: http://orainternals.wordpress.com/
Oracle ACE Director and OakTable member <http://www.oaktable.com/>
Co-author of the books: Expert Oracle Practices
<http://tinyurl.com/book-expert-oracle-practices/>, Pro Oracle SQL,
<http://tinyurl.com/ahpvms8> <http://tinyurl.com/ahpvms8>Expert RAC
Practices 12c. <http://tinyurl.com/expert-rac-12c> Expert PL/SQL practices
<http://tinyurl.com/book-expert-plsql-practices>
