Re: Load balancing between an RAC database cluster and Top Link

Giganews Newsgroups
Subject: Re: Load balancing between an RAC database cluster and Top Link
Posted by:  Daniel Morgan (damorg…@x.washington.edu)
Date: Mon, 26 Jan 2004

Greg Collett wrote:

> All,
>
> We are designing an environment which is comprised of 3 database
> servers clustered together using RAC 10g. Connecting to the database
> is an Oracle Application Cluster of 4 App Servers running toplink.
> Currently the connection is facilitated through XML using oracle jdbc
> drivers.
>
> My question: In order to properly load balance the calls to the
> databse servers, do I require a hardware level load balancer between
> the Application tier and the Database tier?
>
> My understanding is that Oracle chares the db cache between the 3
> servers, and I believe it does load balancing between the servers as
> well. However, the jdbc connection on the app servers currently points
> at 1 database machine directly, and if that machine went down, the app
> could not connect to the RAC cluster (without a manual change). Is
> there a non-hardware solution to get around this?
>
> I am new to some of this and would appreciate any guidance.
>
> Thanks,
> Greg

RAC, itself, balances the load applied to the cluster. You could add the
grid control to balance the entire enterprise.

--
Daniel Morgan
http://www.outreach.washington.edu/ext/certificates/oad/oad_crs.asp
http://www.outreach.washington.edu/ext/certificates/aoa/aoa_crs.asp
damorg…@x.washington.edu
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In response to

Load balancing between an RAC database cluster and Top Link posted by gcolle…@reserveamerica.com on 26 Jan 2004