Re: Using Orcale Parallel Server to archieve nearly zero down time

OPS is based on the concept of raw devices which can be read and actively updated from 2 or more instances. Downtime would be virtually nonexistent if using 8i and automatic transaction switchover. File systems can not be used - at least presently but perhaps in the future.

Jason Wong wrote:

> I am currently looking for a high availability database solution for one of
> system. In my mind, I am planning to implement SUN Enterprise 4000 as the
> Servers, Oracle8i Parallel Server as the database engine, Veritas Cluster
> Server as the cluster manager and Clariion 5700 dual process RAID as the
> data storage.
>
> I want to have two instances of Oracle8i, that share the same database,
> running in 2 separate servers actively. So, when one of them shut down, the
> other can take up the task immediately. I expect the down time to be less
> than 1 minute. However, some vendor told me that even with Oracle Parallel
> Server, two instances of Oracle8i that share the same database cannot be
> running actively at the same time. This is true because at any one time the
> Cluster Server will allow only one server to mount on the disk volume. Hence
> only one Oracle8i instance can access the database. When the primary
> Oracle8i is down, the secondary has to take 15 to 20 minute to initiate the
> database.
>
> Is this true? Has anybody tried a similar setup? Please give me some advise
> and tips.
>
> Thanks in advance!
>
> JasonWong
Received on Tue Oct 19 1999 - 09:08:41 CDT