Mirroring

Dear friends,

I need a guideline.

I ask to keep my data files and redo logs in 2 different places.

But my guy TI does not understand why I should do. They ask me for more details in support of my application.

What do we call it? Mirroring?

I'll just add an additional location in the control file.

All the links on the net related to this?

Please guide me.

Thank you very much.

Creation of a Redo Log group with two (or more) members in two (or more) - mount points is called duplex.

I suppose you create your database on a server with storage.
You may not "mirror" data files. You can create files of data on file systems / Logical Volumes / LUNS that are mirrored by using managers (software) logical volumes or (hardware) RAID-1.

If you are talking about storage-based "block mirror" to another storage to another place (usually done for disaster recovery planning), it can be called "Réplication" or "Continuous" or any other name that provides the storage provider.

If you talk about duplication of the database using Oracle methods, you need first to duplicate the database (generally using RMAN) at the remote site and then use again Shipping (usually via DataGuard).

Hemant K Collette

Tags: Database

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