Vusers are directed to only a single application server instance in a load balanced architecture.
Question ID: 104873
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Every so often Vusers are directed to only a single application server instance in a load balanced architecture.
Vugen scripts are set to point to a VIP, and this seems to only occur in one of the environments and not the other.
Both environments have the same application configurations, VuGen script configurations, same load generator,
one for each of the environments and etc.
Has anyone seen similar issues or have any suggestions from LoadRunner perspective on how to address this?

IP spoofing is enabled in the controller scenario, but the IP Wizard is not set up.
Currently both load generators are set to a single IP address each.

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Posted by (Questions: 108, Answers: 6)
Asked on February 28, 2013 9:15 pm
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Answers (1)
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Private answer

This appears to be an issues with how your Application's load Balancer handle disbursing the load. IF Load balancer is disbursing base on IP then you must configure the IP spoofing properly

Currently your test scenario (as descripted ) is only using 2 ip's one from each Generator so all Vusers on a give generator are using the same IP.

Having IP spoofing on and only one IP per generator is tell the controller to pick a IP for each Vusers from a list of IP that has only one IP. Thus all Vusers get the same IP and the load balancer is sending to the same app server

To use IP spoofing

1. On the each Generation, Run the IP wizard to assign mulit unique IP's
So Generator 1 would have, example
10.11.125.001
10.11.125.002
10.11.125.003
10.11.125.004 to
10.11.125.100

Gene 2 would have multi unique IP's of
10.11.125.101
10.11.125.102
10.11.125.103
10.11.125.104 to 10.11.125.200

2. On the Controller
a. enabled in the controller scenario

NOTE

Once the generators having multi unique IP's assigned the scenario when ran will have the controller assigned
each Vuser a IP from the list of available on that generator

If 200 IP's total (100 per generator) and 300 Vuser. The Controller will use all the IPs
in order and then start over with the first IPs when it reaches Vuser 201

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Posted by (Questions: 17, Answers: 266)
Answered on February 28, 2013 9:17 pm
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