Re: Any-one know how to eliminate PLANNED downtime with Oracle RAC?

From: Finn Jorgensen <>
Date: Mon, 24 Nov 2008 15:34:42 -0500
Message-ID: <>

I'll second what Carel-Jan says. I've been at several client sites with clients asking for 5 9's uptime without having any idea of the cost and effort involved. Once I/we start breaking it down for them, most lighten up on their requirements. It'll take time and cost A LOT of money to implement. Not the least of which is to make sure you hire the best people you can get and pay them what it takes to get them so you implement the right solution. Also, don't forget you need a place to test your solution from time to time...

Most importantly, application changes will be required. many sites are not ready for that. As mentioned, most think they can just throw some money at the problem and it's delievered at their doorstep.

GL and let us know how you fare. It's certainly an interesting problem to work with!


 The fact is that, although many people believe/think/hope otherwise, High
> Availabilty is not a boxed device that you mailorder and have delivered to
> your data center by FedEx. It is something that you have to engineer
> carefully, taking the whole stack, and I mean the WHOLE STACK, including the
> application, into account.
> It is not a plug in. The application design/development is involved. But
> that is how it is, the famous triangle. You want high quality, you want it
> fast, you want it cheap? Pick any two criteria. The other will be violated,
> fiercely violated.
> Best regards,
> Carel-Jan Engel

Received on Mon Nov 24 2008 - 14:34:42 CST

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