Re: Oracle in active-active redundant data centers?

On 20 Sep 2006 10:48:54 -0700, "amigan" <mmedwid_at_gmail.com> wrote:

>Thank-you much Daniel. That's interesting. There are two touted
>advantages of active-active. One is that you can have a global load
>balancing - a DNS SOA which replies with the closest data center/web
>tier address to the client. The idea being that the end user gets a
>faster response via reduced latency to the web tier.
>
>If the DR site is actively running the app tier then you have better
>response time between app tier and web tier than if web tier has to
>interact with the primary site on another continent say. Sounds like
>the latency of reaching a primary Oracle database is just something
>that can't be avoided and you just have to work on prioritizing or
>accelerating that traffic as much as possible.
>
>The second advantage of active-active is faster fail-over time. No
>need to change BGP advertisements say as you might in a more standard
>primary/warm DR site setup.
>
>Michael

Both Oracle Database and Oracle Application Server support RAC. If you are smart enough NOT to put them on one and the set of servers, you would have load balancing at the midtier and at the database tier.

Assuming you are human, and humans still read from top to bottom and not the other way around, could you please refrain from top-posting?

--
Sybrand Bakker, Senior Oracle DBA