RE: RAC Vs Standby Database between Primary and Secondary Data Centers
- From: <krish.hariharan@xxxxxxxxxxxx>
- To: <mssql_2002@xxxxxxxxx>, <oracle-l@xxxxxxxxxxxxx>
- Date: Tue, 8 Jan 2008 18:46:56 -0700
Bob,
The technologies you reference are not in that sense mutually exclusive
(perhaps). That said, the first things I look at are:
RPO (Recovery Point Objective) - To what point to recover to, i.e., how much
data can you afford to lose without losing business functionality
RTO (Recovery Time Objective) - How soon should you be up and running and
"available"
And I am going to create/introduce a term I have thought about over the
years
RCO (Recovery Cost Objective) - What does it cost to failover vs waiting for
the failed system to return to normalcy
I am sure that there are a multitude of papers that talk about these
technologies. IMHO, though, this is not merely a question of technologies.
It is a question of among other things
1. Defining the scope of what you are trying to protect (technically,
organizationally, and politically) and cost of protecting vs not.
2. Knowing the weakest links
3. Organizational maturity to define, maintain, and sustain these policies,
procedures, and complexities.
In the end you may need a combination of both or something else altogether.
Regards
-Krish
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]
On Behalf Of Bob Robert
Sent: Tuesday, January 08, 2008 2:16 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: RAC Vs Standby Database between Primary and Secondary Data Centers
Gurus,
I need your opinion regarding setting up High Availability solution
between Primary and Secondary Data Centers. Is it better to go with
Oracle RAC or Oracle Standby database.
Thanks In Advance,
Bob
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