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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Oracle Real Application Clusters
Tim - Gee, during the original presentation I attended, RAC was presented as
a cost-saving feature. Something about being able to use a lot of cheap
Linux servers. This stuck me as a little odd at the time. Just now, I looked
at the white papers that Oracle posts on the subject, and I didn't see the
cost-saving aspect mentioned. Or maybe Oracle is still getting the Linux
ball rolling.
Dennis Williams
DBA, 40%OCP
Lifetouch, Inc.
dwilliams_at_lifetouch.com
-----Original Message-----
Sent: Wednesday, October 23, 2002 9:05 AM
To: Multiple recipients of list ORACLE-L
Aye to that, but you'll need at least two, possibly three, identical clusters, not just one. One cluster for production and an identical cluster for QA/Test, and possibly one for development (though that last is often regarded as unnecessary). Skimping on the QA/Test environment is the leading edge of failure...
RAC itself requires additional DBA expertise as well as additional OS SysAdmin expertise for cluster hardware/OS, each of which costs more to obtain/maintain (either by hiring experienced/talented or training to build or both). Clustering is not a low-cost solution from any perspective...
RAC is a solution for certain specific high-availability and high-scaleability requirements (not including "data-center failure", a.k.a. disaster-recovery), so it's a good idea to be certain that you are planning a solution that meets your own specific requirements before proceeding. RAC should not be a high-level management decision -- it is a specific technical solution to meet specific technical requirements, which themselves should have been derived from the requirements of the business. There are several other possible H/A solutions in Oracle9i (i.e. physical standby, logical standby, advanced replication, OS failover solutions, RAC, etc), each of which addresses the same H/A problems in different ways with differing levels of complexity and cost.
IMHO, the main requirement is that you have to have a system that needs to be up 24x7 on a cluster and your ability to fork enough money to Oracle and your server vendor (to get two identical machines) and your networking vendor (for redundant network connections).
Rest everything is easy ...
Raj
Rajendra Jamadagni MIS, ESPN Inc.
Rajendra dot Jamadagni at ESPN dot com
Any opinion expressed here is personal and doesn't reflect that of ESPN Inc.
QOTD: Any clod can have facts, but having an opinion is an art!
-----Original Message-----
Sent: Wednesday, October 23, 2002 3:04 AM
To: Multiple recipients of list ORACLE-L
Dear All,
We are planning to implement ORAC for our application, can anybody tell me where to get good information on the system requirements for implementing the same.
Regards
Prem
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: DENNIS WILLIAMS
INET: DWILLIAMS_at_LIFETOUCH.COM
Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services ---------------------------------------------------------------------To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). Received on Wed Oct 23 2002 - 11:23:30 CDT
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