Re: Oracle DR Solution

One drawback with the dataguard route is the "… no loss or downtime" 
requirement. 

Sure data guard and be configured to ensure no data loss, but it can't give you 
no downtime.

Is that no downtime really a requirement? If you are serious about that, you 
have to go to some form of Active - Active setup across datacentres, with 
stretched RAC as a possibility.

I'd also argue that there are few businesses that really in a catastrophic 
scenario can't afford a handful of minutes to enact a failover.

jason.

--
http://jarneil.wordpress.com



On 31 Aug 2011, at 11:35, saurabh manroy wrote:

> Extended/Stretch RAC is a low cost but rather incomplete DR solution. 
> Low Cost: In-terms of number of resources need to maintain the environment. 
> DataGuard maintenance needs additional skills (apart from knowing RAC). Also, 
> not to forget licensing costs for DataGuard.
> Incomplete: Distance between nodes of cluster is still a major factor. Though 
> 11g comes with preffred mirror read options, internode communication would 
> still be an issue over long distance. So, less distance between nodes means, 
> both sites would likely stop functioning in situations of: flood, earthquake 
> etc.
> 
> Since Cost is not an issue for Sanjay, Primary DB as a RAC cluster  and 
> Standby DB also a RAC cluster would be a better solution in my opinion.
> 
> Regards,
> Saurabh Manroy
> http://smanroy.wordpress.com 
> 
> 
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> From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On 
> Behalf Of Sanjay Mishra
> Sent: Tuesday, August 30, 2011 3:28 PM
> To: oracle-l@xxxxxxxxxxxxx
> Subject: Oracle DR Solution
> 
>  
> 
> Hi
> 
>  
> 
> I am looking to see what is the best option to have DR solution that can be 
> Primary with no loss or downtime. Looking for best practices even it is 
> expensive solution. Appreciate for any document or link as I am sure lots has 
> done work on it. One of the requirement is that database is around 10Tb and 
> transaction logs will be be not more than 50G in an hour.
> 
>  
> 
> 1. Can see 11g Active Dataguard which can be used for Reporting as well as DR 
> solution
> 
> 2. Storage Replication
> 
>  
> 
> Rgds
> 
> Sanjay
> 
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