Redirect to different pool based on no.of connection

Hi Ganesh,

You can set the Connection Limit on the Servers (within the Pool) and then monitor the situation with the iRule call. A server reaching its connection limit is the same as the server going temporarily unavailable / down from the perspective of the LTM, so it will act accordingly.

This is an example that you can see in action:

 
when HTTP_REQUEST {
if { [active_members http_poo_name] == 0 } {
log local0. "Connection Limit Reached / No pool members available."
}
}

NOTE / WARNING: This is Connection Based, NOT Session. So you could see some strange behavior because of this. Most browsers will automatically spin up 1-5 threads / TCP Connections to an individual site to retrieve the content quicker, so you could run into a situation where some requests from the same user could be in one pool (or subject to whatever action you specify) and other requests could go to another pool.

I would suggest setting your server connection limit low and testing the behavior that you are wanting to implement (you may find that you are going to want to seek out an alternative).

Hope this helps.