topic Re: tcp/ip load balancing in Operating System - HP-UX

tcp/ip load balancing

m.ibrahim elmordea — Mon, 17 Jan 2005 08:15:43 GMT

friends :

I have two hp-ux servers rp4440 running as
oracle application server 9i/as
I used Cisco switch to make load balancing between two servers , there is any application can I used on hp-ux to do load balancing without Cisco switch.

Re: tcp/ip load balancing

Steven E. Protter — Mon, 17 Jan 2005 08:43:44 GMT

There are DNS configurations referred to as round robin DNS assignment that can handle load balancing between distinct IP addresses without benefit of a fancy switch.

These links are Linux but DNS works exactly the same on both platforms.

http://www.webopedia.com/TERM/R/Round_Robin_DNS.html

http://www.vergenet.net/linux/mail_farm/html/node10.html

My search:
http://www.google.com/search?hl=en&q=round+robin+dns&btnG=Google+Search

SEP

Re: tcp/ip load balancing

Geoff Wild — Mon, 17 Jan 2005 09:09:55 GMT

HP Auto Port Aggregation

http://software.hp.com/portal/swdepot/displayProductInfo.do?productNumber=J4240AA

Rgds...Geoff

Re: tcp/ip load balancing

Biswajit Tripathy — Mon, 17 Jan 2005 09:51:31 GMT

Another way to do it is to use NAT feature
available with HP-UX IPFilter firewall. If you are on
HP-UX 11i,v2, then IPFilter must be already
installed on your system. If you are on HP-UX 11i,
the you can download free IPFilter bits from
software.hp.com.

Use the NAT redirect feature (keyword "rdr") to do
load balancing. Details at:

http://www.docs.hp.com/en/B9901-90021/ch02s04.html

See the section on "rdr". You should also know that
this load balancing is basically round-robin.

- Biswajit

Re: tcp/ip load balancing

Paul Cross_1 — Mon, 17 Jan 2005 12:39:02 GMT

Comment on round robin DNS:
Keep in mind that a cisco local director or BigIP does some elaborate service checking before forwarding requests to the server pool. Round robin DNS doesn't.

IE: If you have 2 web servers configured in DNS for www.example.com and one of them is not responding, every second request to http://www.example.com will fail.

Re: tcp/ip load balancing

m.ibrahim elmordea — Tue, 18 Jan 2005 02:56:40 GMT

thanks all for your help ;
but about Auto Port Aggregation , its not useful because it must do in the same server ,
and you can't aggregate two nic card in different server .

I found software support hp-ux depend in round-robin ,and can solve failover problem
and its free to one year .
http://www.bea.com

again thanks .

Re: tcp/ip load balancing

Biswajit Tripathy — Tue, 18 Jan 2005 03:04:59 GMT

Hi Ibrahim,

If the solution you choose is not significantly
better than IPFilter solution I proposed, then I
would really advice you to look at IPFilter. It's
very easy to setup, software comes free from
HP and has full HP support.

Ofcourse, the choice is yours.

- Biswajit