Global Variable and session variable in a LTM iRule

Hi,

 

 

How do I set a Global Variable that a Sinlge iRule can reference when triggered by different time ?

 

eg. I would like to do a new connection per second limit.

 

 

 

Furthermore, How do I set a Global Variable that mulitple iRule can reference ?

 

 

Is there any example for reference ?

 

 

Thanks.

 

 

Billy