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(near)Zero Downtime Upgrades for Oracle 11g/12c — Introduction and Options

So, now that I have completed my series on  OpenLDAP for Oracle Net Service Name resolution, my next little adventure will be exploring the possibilities of zero downtime upgrades for Oracle 11gR2 and 12cR1.  This is an area that I don’t have a lot of experience with, so, I’ll be pretty much starting at ground zero.

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YPDNGG: You Probably Don’t Need Golden Gate

Before launching into this, I must give due deference to Mogens Nørgaard’s landmark article, You Probably Don’t Need RAC (YPDNR), available here, but originally published Q3 2003 in IOUG Select Journal.  Mogens showed that you can be a friend of Oracle without always agreeing with everything they do.