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tbruheim1967Flag for Norway

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Is there a free network dispatcher/cache server/sprayer out there?

An IP sprayer has many names:
1) IP sprayer
2) network sprayer
3) load balancer
4) network dispatcher
5) load dispatcher
6) and even cache server is used sometimes

But the functionality is the same. You want to spread the load on different servers, or maybe have failover servers.

Question
Is there a freeware dispatcher out there?.
I intend to use it in front of a Lotus Domino cluster. Yes I know about the websphere Edge Components, but it costs a fortune. The Domino cluster solution with ICM alone is not optimal. The problem is that ICM produces different URLs when it routes a request to a server in the cluster.

The Lotus Domino administrator give us the idea that an IP sprayer should be used instead of the ICM. Again, is there a free IP sprayer out there?
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torakeshb
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Ultramonkey will work for Apache and MySQL as far I can see, but will it work in front of a Domino cluster?

I accept your answer as a partial solution.
I believe it should work. Ultramonkey is a TCP/IP load balancer, so it should loadbalance Dominos front end traffic too. But I never tried practically.
Thanks a lot for your fast answer. Don`t you agree that there must be some API interaction between Ultramonkey and Lotus Domino if this should work properly? Otherwise Ultramonkey will not be able to detect the actual load of each Domino server in the cluster. Maybe I can get this to work with TCP/IP load balancer, but one question remains:
Question: What kind of algorithm is Ultramonkey using? Is it the total server load and availability? Do you have any ideas?
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Thank you very much. No doubt about it. One ore more of this algorithms will work. The important issue here is to discover the load of the servers OS it self's, not just the load of Domino services. I will start implementing Ultramonkey right away.