Load Balancing between 2-node cluster

[FLQ]

Hi all,

I have a quick question...

How can one use 2 HP9000 boxes to do load balancing for an SAP instance?

I would like to implement a solution for one of my customer so I can shutdown one machine and have maintenance done while the other one would be serving users.

Then I want to be able to put back the box in service without interruption or package switching.

TIA for your prompt replies

Francis Le Quellec

[MANOJ SRIVASTAVA]

Hi Francis


How we do this stuff here is

2 Node Clsuter
Oracle Up on one server
Applciation up on both servers pointing to the database on the single server say A
user come throguh a Virtual IP whioch is assigned to a load director that is the laod direcotr splits the incoming users at a percentage like 60 40 to both the servers , incase one of the serve is down then oracle switches to server B and Load direcotr routes all teh traffic to server B.


Key is Load Director , incase u dont have it then the best way is to use a intellignet switch and may be still use the virtual ip concept to atleast split it 50%


Manoj Srivastava

[Christopher McCray_1]

Hello,

The only product I know of that has that functionality is Oracle Parallel Server (OPS).

In all other application packages, a node must have the vg(s) activated and filesystmes mounted under its control. In this case there must be a few minutes in which the package switches from one node to the other.

Chris

[harry d brown jr]

Francis,

There is a feature in your profile that allows you to find previous Questions you have posted, which makes it easier to take care of this:

This member has assigned points to 0 of 47 responses to his/her questions.

http://forums.itrc.hp.com/cm/TopSolutions/1,,CA636108!1!questions,00.html

live free or die
harry

[FLQ]

Mr Brown, I do not understand why you replied to that message telling me that I have not assign points to 47 answers...This will probably help people not to reply to my questions

I use this site alot and I find it utmost interesting as I usually get the right answer very fast but I also encountered many, many problems regarding point assignment so I do not see your point there.

I also have an email address that you should have used instead of posting at large.

If you have anything to discuss regarding that, please use my email: francis.le.quellec@cgi.com

Thanks anyway for giving me the url to correct that.

Francis Le Quellec

[Sridhar Bhaskarla]

Hi Francis,

We will need to depend on the application architecture to load balance the systems. It is hard to try to loadbalance the systems without the help from application. You can do something as posted by Manoj.

Usually the applications are multi TIERed. The middleware softwares like MQ, Tuxedo etc., do have load balancing features.

-Sri