Re: DR implementation using Dataguard ... Best Practices ?
Date: Mon, 9 Jun 2008 12:59:42 -0400
Message-ID: <b86c876f0806090959w3109b4c4w79495b0cdbf45073@mail.gmail.com>
On Mon, Jun 9, 2008 at 8:13 AM, VIVEK_SHARMA <VIVEK_SHARMA_at_infosys.com> wrote:
> A production Site is looking to Deploy Dataguard(with RAC) as its DR
> Solution. Can Hostname / IP Address of DR machines be kept same as production? ... is
> it an advisable practice?
If you want to keep the same IP, that DR box has to be in the same broadcast domain (same VLAN). However, you can't have 2 MAC addresses mapped to the same IP; so, you need to shut down that tcp/ip stack, but bring it up when the other is down (this is the approach many HA solutions provide; there is another way of doing with backhand architecture). Given you need to ship redo logs from one site to another, both can't have the same active IP address.
It is possible to have multiple IP addresses for the same hostname.tld, but that defeats the purpose of DR. It is kind of active-active load balancing set up.
-- http://www.freelists.org/webpage/oracle-lReceived on Mon Jun 09 2008 - 11:59:42 CDT