JMeter Tips
Extracting Text from Responses Use the Regular Expression Extractor and have it as a child on the request you want to get data from. Set the template value to $1$ to populate your variable name with the matched item in the group (). Otherwise your variable will be called
refName - the value of the template refName_gn, where n=0,1,2 - the groups for the match refName_g - the number of groups in the Regex (excluding 0)
Use Global variable for hostname Be sure to check the Servername on all Http Request to make sure they are not overriding the global one.