will rand() cause performance issue

Hi,Ryan

 

 

what I am trying to achieve is:

 

I have two pool cjj1 and cjj2

 

20% request to cjj1 while 80% request to cjj2

 

in one session,the 20% user will still persist hit pool cjj1

 

 

when HTTP_RESPONSE {

 

HTTP::header replace StubHubBlade [LB::server name]

 

if { $stubhubA_cookie == 1 }{

 

HTTP::cookie insert name stubhubA_cookie value 1 path "/"

 

}

 

if { $stubhubB_cookie == 1 }{

 

HTTP::cookie insert name stubhubB_cookie value 1 path "/"

 

}

 

 

 

when HTTP_REQUEST timing on {

 

if {[class match $uri starts_with gen3abURLs_SRWD29]} {

 

 

if {[HTTP::cookie value stubhubA_cookie] == 1}{

 

pool cjj1

 

return

 

}

 

if {[HTTP::cookie value stubhubB_cookie] == 1}{

 

pool cjj2

 

return

 

}

 

if { rand() <0.2 } {

 

pool cjj1

 

set stubhubA_cookie 1

 

return

 

}

 

else {

 

pool cjj2

 

set stubhubB_cookie 1

 

return

 

}

 

 

 

1:do we have other method to achieve this?

 

2:if not,how to optimize this rand()?