qazmlp1209_at_rediffmail.com wrote:
> There are two servers between which DataGuard is setup. The replication
> happens from server-1 to server-2. server-1 is currently serving and
> server-2 acts as a standby. I would like to know the following related
> to this setup:
> 1) server-2 is in standby mode. Can server-2 start serving immediately
> in case if server-1 goes out-of-service due to some problems? If not
> immediate, how much time it will typically take for take-over?
>
> 2) Assume server-2 has started serving and hence it is in 'Active'
> mode. Is it possible to do reverse replication of DB changes from
> server-2 to server-1(similar to the replication from server-1 to
> server-2 before takeover happened)?
>
- You provide us with the answer, as you have tested your scenario.
You *did*, now did you not?
And no - there is some overhead, for starters, server 2 has to
become aware of the fact server 1 died.
- Yes - and you actually *want* that. Repair server 1 and make it
the backup of #2 - in case #2 gets hit by the same problems as #1
did suffer from...
Again - you tested that scenario, didn't you (tongue in cheek!)
--
Regards,
Frank van Bortel
Received on Sun Jun 05 2005 - 07:44:17 CDT
