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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Oracle Real Application Clusters
Hi,
Could you please give me the links to these white papers...?
DENNIS WILLIAMS <DWILLIAMS_at_LIFETOUCH.COM>
Sent by: root_at_fatcity.com
10/23/02 09:53 PM
Please respond to ORACLE-L
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
cc:
Subject: 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-LReceived on Thu Oct 24 2002 - 00:23:30 CDT
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