RE: Any-one know how to eliminate PLANNED downtime with Oracle RAC?
- From: "Michael Fontana" <mfontana@xxxxxxxxxxx>
- To: <keith.fahrenfort@xxxxxx>, <oracle-l@xxxxxxxxxxxxx>
- Date: Mon, 24 Nov 2008 12:51:10 -0600 (CST)
I think you can observe from the many responses you've already received
that this is remotely possible with a hurculean (read: expensive) effort,
and possibly only then by coordinating different products and
architectures to assure availability. Before even answering the question,
I would ask:
1 - What is the business purpose for this requirement? Doing so will be
quite costly!
2 - If the requirement is only for Oracle, would it be OK to do Oracle
patch/upgrade/maintenance during some other outage period? Even if
unplanned?
3 - Oracle is only as reliable as it's supporting infrastructure. If the
hardware/network/software is not as reliable as your RDBMS infrastructure,
it will hardly make a difference.
Please keep in mind that the largest enterprises in the free world
regularly have planned outages for maintenance. If you don't believe me,
try any banking or airlines reservation site in the wee hours some weekend
morning.
It's only wise to have some kind of window to perform necessary
maintenance on a planned basis It's the best way to avoid the unplanned
outages that are truly business disasters!
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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 10:26 AM
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!
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Keith Fahrenfort
Solutions Architect - Hewlett Packard
Solution Design Services for Oracle
Shared Solutions Architecture
HP Americas Solution Architecture
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Design Team
keith.fahrenfort@xxxxxx
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