I was able to have the group that configured the load balancer determine if the 
Remedy Service was started/running.




-----Original Message-----
From: LJ LongWing <lj.longw...@gmail.com>
To: arslist <arslist@ARSLIST.ORG>
Sent: Fri, Dec 10, 2010 10:51 am
Subject: Load Balancers and how?


** 
Ok….I’m going down a road that I KNOW some of you have travelled before, I need 
your travel tips.  We are setting up a server group on 7.5 Windows and we are 
putting a load balancer in front of it.  How do you all tell if a node is up?  
There are 4 types of probes that I’m being told are available…
 
PING
HTTP
TCP
Script
 
Ping  - Obviously doesn’t tell you anything other than the host OS is up
HTTP - Won’t work for telling if a remedy service is up
TCP – My instincts are telling me that this one simply does something similar 
to a telnet to a given port, if the port allows you ‘in’, then the service is 
considered up.  I don’t consider this one viable because it doesn’t ‘test’ much 
and I expect that my remedy server could respond to the port request without 
actually being functional
Script – This one is the most promising in my mind, but I know nothing about 
the scripting language of TCL.
 
How does the rest of the remedy world ‘verify’ that their remedy instance is 
online so that their load balancer can know to route traffic to it or not.  I 
just this week finished a java servlet that allows the mid tier load balancer 
to know if an individual node is working properly, but the same can’t be said 
yet for Remedy….any and all help is appreciated
_attend WWRUG11 www.wwrug.com ARSlist: "Where the Answers Are"_ 

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