Re: Splitting a database: pro and cons

I'm currently engaged in trying to join two databases that were split. The databases are supposed to be twin images of each other but, of course, they're not.

But you may be taking a different route. WIll any objects in database A be twinned in database B? Do you have lookup tables that will be in both databases? Are your primary keys generated by sequences and will the sequences be twinned in both databases? Will the manager of application A go to the boss of the manager of application B and tell him that database B doesn't produce the same results as database A?

If the answer to all of the above is, "No," then you probably do have two logical databases. Go ahead and split them. Otherwise, you've got a world of grief ahead of you trying to keep them synchronized. Think about policies and procedures to keep the data structures (much less the data) synchronized.

                                                                                       
          
                    Djordje Jankovic                                                   
          
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                    08/14/2001 06:51 PM                                                
          
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Hi list,

I have two applications running against one database (in fact I have a few but for the sake of this question two are enough). The two apps have different upgrade patterns and I would like to split them in two databases that will be on the same unix server. There are some views that are used extensively that join data from both apps/schemas, and after the split those
should be made using db links. I did some tests and comparisons of queries going through links versus running them directly on the database, and did not see a lot of difference.

Does anybody see or know of any downside in splitting the database in two :-(. And any advantage :-). What is the general strategy when installing different apps (from different vendors) - put them on separate databases or combining them.

Thanks.

Djordje

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