Re: Oracle DR Solution
- From: Sanjay Mishra <smishra_97@xxxxxxxxx>
- To: "jason.arneil@xxxxxxxxx" <jason.arneil@xxxxxxxxx>, "saurabhmanroy@xxxxxxxxx" <saurabhmanroy@xxxxxxxxx>
- Date: Wed, 31 Aug 2011 08:58:42 -0700 (PDT)
Jason
Yes it was my mistake to say no downtime but actually it is least downtime.
Ofcourse we can use Fast Start failover to minimize the switcover/failover time
based on business requirements and avoid some manual intervention.
So What I can see is the Dataguard and Storage based replication as two main
choices but want to see how Storage based can provide more better solution over
dataguard on technical side and not on financial terms and what is best
practices in critical online environment
TIA
Sanjay
________________________________
From: jason arneil <jason.arneil@xxxxxxxxx>
To: saurabhmanroy@xxxxxxxxx
Cc: oracle-l@xxxxxxxxxxxxx
Sent: Wednesday, August 31, 2011 8:47 AM
Subject: 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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>>
>>
>>
>>--
>>Niall Litchfield
>>Oracle DBA
>>http://www.orawin.info
>>
>
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