We are looking at GoldenGate software as one of the possibilities. I think 11G with Dataguard/Standby instances etc. would come much closer to that goal . try searching for HAA solutions (Oracle High Availability Architecture) . -Juergen Stegmair Enkitec From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of William Wagman Sent: Monday, November 24, 2008 10:59 AM To: guillermo.bort@xxxxxxx; Fahrenfort, Keith (PSS Americas Oracle); oracle-l@xxxxxxxxxxxxx Subject: RE: Any-one know how to eliminate PLANNED downtime with Oracle RAC? I believe you would have to use a combination of RAC and DataGuard to do this. Bill Wagman Univ. of California at Davis IET Campus Data Center wjwagman@xxxxxxxxxxx (530) 754-6208 From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Bort, Guillermo Sent: Monday, November 24, 2008 8:38 AM To: Fahrenfort, Keith (PSS Americas Oracle); oracle-l@xxxxxxxxxxxxx Subject: RE: Any-one know how to eliminate PLANNED downtime with Oracle RAC? Well, I'm not sure this is entirely possible. Using rolling upgrades (which I understand were improved in 11g) could help, but from the base, there are *some* patches that would require downtime. However, this could be an interesting case. And if all else fails, you can always try contacting Oracle Consulting. or Tom Kyte trough ask tom. Guillermo Alan Bort DBA / DBA Main Team EDS, an HP company ITO Arias 1851 Ciudad Autonoma de Buenos Aires (C1429DXC) Argentina Tel: +54 11 4704-3132 E-mail: <mailto:name.name@xxxxxxx> guillermo.bort@xxxxxxx We deliver on our commitments so you can deliver on yours. From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Fahrenfort, Keith (HP Shared Solutions Architect for Oracle) Sent: Monday, November 24, 2008 2:26 PM To: oracle-l@xxxxxxxxxxxxx Subject: Any-one know how to eliminate PLANNED downtime with Oracle RAC? Hi, I'm working with a customer running a critical web site on a 10gR2 RAC backend DB - they support hundreds of thousands of simultaneous connections at the "quietest" time. They have expressed a desire for NO downtime during ANY changes to Oracle, particularly the application of Oracle patches and Oracle upgrades (both minor and major), etc. Any thoughts? Who's "been there done that"? Thanks! Regards! _____ Please let me know if you prefer to not receive email from me. Keith Fahrenfort Solutions Architect - Hewlett Packard Solution Design Services for Oracle Shared Solutions Architecture HP Americas Solution Architecture Call 1.800.424.0993 option2 or email pss@xxxxxx to reach the Solution Design Team keith.fahrenfort@xxxxxx <blocked::http://www.hp.com/go/oracle> http://www.hp.com/go/oracle For HP's privacy policy and contact information, please see <blocked::http://welcome.hp.com/country/us/en/privacy.html> http://welcome.hp.com/country/us/en/privacy.html _____