Re: Redundant Replicated Systems???

slhuffst_at_my-deja.com wrote:
>
> I have been posed a question to which I have been unable to locate an answer.
> Maybe someone can help me out.
>
> I have been asked to identify a method to configure a system with the
> following qualities:
>
> 1) 2 pairs of replicated databases ( System 1 ( Server A & B replicated),
> System 2 (Server C& D replicated) ( System 1B replicated to System2D) 2) The
> ability to take one System offline - modify the Stucture of the Database -
> while keeping the second system up and running.
>
> For instance:
> System1 - taken offline
> System 2 - continues transaction processing
>
> System 1 - modify database structure
> System 1 - bring online (somehow)
>
> System 2 - propogate data mods to System 1
> System 1 - progagate db structure changes to System2
>
> The order of this is not important - as long as the system is never
> completely down.
>
> Has anyone ever seen anything like this? Any information would be appreciated.

You're funny.

Have you been able to allow system2 to continue operating without removing the replication group (Sys 1B & Sys 2D)?

If so, I'd be interested in how! At present I can only see removing that group. Removing System1 repgroup. Make db structure changes. Add repgroup system1 back. Add repgroup (Sys 1B & Sys 2D) back. After getting status back to normal, remove (Sys 1B & Sys 2D) again! make db changes and then restore repgroup and coalesce.

This is my understanding, I'd like to know it's wrong. Anyone? Received on Mon May 15 2000 - 00:00:00 CDT