RE: Oracle DR Solution

I rely on the Oracle Golden Gate Statement of Direction which indicates positioning. http://www.oracle.com/technetwork/middleware/goldengate/overview/statement-of-direction-gg-132120.pdf

DataGuard for Physical Standby with Zero Data Loss Optionally additional GoldenGate for bidrectional replication.

When talking of DR as DR, I would position GG as an addition to DG but not as an alternative.  
Hemant K Chitale

-----Original Message-----
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Gaja Krishna Vaidyanatha Sent: Thursday, September 01, 2011 12:31 PM To: Oracle-L List
Subject: Re: Oracle DR Solution

Hi Hemant,
Good morning! What you state may be relevant to your environment but does not necessarily have to be the case for every environment. Here is a real-life example:

Company with 3 datacenters - A (PRIMARY), B (HA) and C (DR). A and B are 60km apart in the same state. C is totally different state and a different timezone and is 1,572 miles away. B & C are reasonably in sync with the contents of A and this is done using Oracle Golden Gate. A, B and C all run Oracle, the same version of Oracle and are on the same platform.

A has a serious failure. B is now the PRIMARY. Reporting needs to be offloaded to DR, to maintain SLAs on B. The reporting component of the application utilizes and manipulates Global Temporary Tables, thus requiring the database to be in READ/WRITE mode. Cannot use DG or Active DG in this case, because one cannot manipulate a GTT in a READ ONLY WITH APPLY mode database. Replication using Oracle Golden Gate is the way to go, thus making it a DR solution.

Best regards,

Gaja

Gaja Krishna Vaidyanatha,
CEO & Founder, DBPerfMan LLC
http://www.dbperfman.com
Phone - 001-650-743-6060
Co-author:Oracle Insights:Tales of the Oak Table - http://www.apress.com/book/bookDisplay.html?bID14 Co-author:Oracle Performance Tuning 101 - http://www.amazon.com/gp/reader/0072131454/ref=sib_dp_pt/102-6130796-4625766

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