I had created multiple http requests. But I want to run a http request among the several http request.
Is it possible to run a http request alone ?
Can any one please help?
Just select all requests you don't want to be run in JMeter GUI, and choose Disable either in context menu (on right click) or from Edit item of JMeter's main menu.
If you want to enable/disable specific Test Elements from command-line the easiest option would be using Taurus tool as a wrapper for your JMeter test. Taurus naturally supports JMeter and it is capable of overriding original JMeter test plan settings via simple YAML configuration file.
References:
You can use a particular controller for that that should contain your 30 requests:
Disableoptions? It's so easy to configure. Just right-click on the requests from JMeter-GUI and select "Disable".