The need for multiplexing of files when the separation of disks are on SAN

Oracle 11 g 2

Hi all

I see different opinions/statements concerning the need to multiplex when files (control files, redolog, storage files, etc...) Without (LUN) addressing this issue. Because LUNS are spread you encounter conflicts. If this is true, what is the need to multiplex of files and even separate tablespaces? Why not just have everything on a LUN?

I appreciate all the answers from the experts.

Thanks to you all.

EdStevens wrote:

It's the same sysadmin who will someday decide he needs to free up space disc of delting files that are not needed .

Not when you use ASM. And IMO ASM should the first considerations. Must be reasons for NOT using ASM - rather than the reverse.

Space SAN without high-end are quite expensive - because it is fairly sophisticated ito redundancy, load balancing, performance and all that.

So if you want to make redundant on the database side, there is a cost impact you need additional LUNs for this. And this must be justified. I bet most of the time you will be not able to the SAN architecture has all these issues covered. And human error is an operational matter that should be handled through operational procedures and control change management - something else that you can argue that every piece of s/w and h/w and infrastructure must be duplicated and triplicated same like a fool can fubar it. And it is not practical or cost-effective. Get rid of the silly instead.

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