Data Guard - allocation of licenses and other fundamental questions before setting it up.

Hi all

Please allow me to submit some questions about Oracle Data Guard.

There are 2 databases 'authorized and ready ':

-a single instance of the "alfa", Oracle Enterprise Edition 10.2 database,

-"bravo", Oracle 10.2 Enterprise Edition, Real Application Clusters database

I have to "align" congratulations to alfa on a daily basis, so that--in case of failure of the main 'alfa' site - recovery is possible change to the site "bravo."

(1) even if we can afford a loss of data corresponding to the period little uttered at the end of the last daily alignment (no need to 'transactional' alignment between the two databases), I assume that the best approach to meet this need in terms of efficiency and manageability consists on two databases including in a Data Guard configuration.

Am I wrong?

(2) in particular, the physical implementation of the standby database must be preferred over logic, because that "simpler and faster" in this case. Am I wrong?

(3) only the Data Guard configuration require

(a) additional licenses?

(b) additional material/software resources for host machines?

(5) the release of two databases must be equal to the specific to the component version number (10.2.0.1, for example)? Or, for example, is a 10.2.0.1 able to work with a 10.2.0.3 db db in the Data Guard configuration?

Thank you very much in advance!

Marco mazzocchi

Hello

(1) even if we can afford a loss of data corresponding to the period little uttered at the end of the last daily alignment (no need to 'transactional' alignment between the two databases), I assume that the best approach to meet this need in terms of efficiency and manageability consists on two databases including in a Data Guard configuration.

Am I wrong?

You have reason, physical hosting it good thing. For the most part, you will get impact with until or unless data loss because of some problems of network (or a configuration problem)

(2) in particular, the physical implementation of the standby database must be preferred over logic, because that "simpler and faster" in this case. Am I wrong?

Logical standby is a little different from the physical standby mode

(3) only the Data Guard configuration require

(a) additional licenses?

(b) additional material/software resources for host machines?

Data features come with Enterprise Edition - perhaps for the active database "cost of the additional license.

https://docs.Oracle.com/CD/E11882_01/license.112/e47877/editions.htm#DBLIC109

(5) the release of two databases must be equal to the specific to the component version number (10.2.0.1, for example)? Or, for example, is a 10.2.0.1 able to work with a 10.2.0.3 db db in the Data Guard configuration?

Good level to maintain the same level of oracle binaries / patches and still the support of heterogeneous DG

-Pavan Kumar N

Tags: Database

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