IRule Creation help

I'm sure that some other folks will have ideas here too, but this particular issue is a little hard to solve directly. After all, how much of your traffic is 2%? You won't really know what 2% was until your day is done and you're counting requests in your server logs. But you can approximate it using something like below.

**Note: This uses the (totally great) table command, which requires 10.1 or higher. Also, this rule is an example only and it may not work for your requirements. That said, it will send 2% of HTTP requests to a specific place.

when HTTP_REQUEST {

    set requestNum [table incr "mkt_count" ]

    if { $requestNum >= 99 }{
        table set "mkt_count" 0
    }

    if { $requestNum == 1 or $requestNum == 2 } {
        log local0. "Got a 2% request. Counter is at $requestNum"
        pool marketing-pool
    } else {
       log local0. "Got a normal request. Counter is at $requestNum "
        pool default-pool
        }
}

Give this a whirl in your test environment and see if it will work for you. Obviously, change your pool names to match. Also, if any of the smart folks out there have ideas to bulletproof this approach please chime in! This is a very cool use case.

HTH,

-Matt