irule performance issue

Question

We recently got bought out and I had to redirect about 800 URI's. I wrote three irules to accomplish this because I was crossing the character limit for each irule. I noticed that the website took quite sometime to redirect and caused alot of performance issue for this. Is there any way around this?

kevin_davies_40 · Accepted Answer

You should be using data classes for this task. Something similar to..
when HTTP_REQUEST {
  if {[class match [HTTP::uri] equals myclass]} {
     HTTP::redirect [class match -value [HTTP::uri] equals myclass]
  }
}

Then define a string data class with your redirect requirements.
Name                  Value
/home                 http://newhome.host.com/home
/home2                http://otherhome.host.com

kevin_davies_40 · Answer

This can be easily adapted for hosts, use [HTTP::host] instead of [HTTP::uri] and the name in the data class becomes the host name. Also we used the matching expression "equals"... there is also starts_with, ends_with and contains for more flexibility.

shaggy · Answer

In addition to Kevin's solution - newer versions of BIGIP handle data groups much more efficiently than older code levels, so perceived performance could also be impacted by the running code-level.

jg · Answer

I would just have a VIP to take all these requests at the F5 device and pass them to an Apache server at the backend to do all these redirects, which is a lot easier to set up and maintain.&nbsp;

jg · Answer

Well, at the minimum and at this point, it is easier to open a file of 600+ items with vi and do some global replacements there as needed, to me. :-)&nbsp;
I used to have to handle 1200 URL redirects at one go that way in the past.&nbsp;
But for each to his/her own way....&nbsp;

kevin_davies_40 · Answer

You can actually use a file as a data class. &nbsp;
External Data Groups&nbsp;

Forum Discussion

irule performance issue

8 Replies

Recent Discussions

F5 - insert http header on redirect and carry it over to the redirected site?

Cookie insert via http:redirect - can it be configured "secure"?

Dynamic url redirection feasibility

HIRE MOST EXPERIENCED SCAMMED CRYPTO RECOVERY EXPERTS

How to Make Coffee for Weight Loss

Related Content

High Performance Intrusion Prevention

iRule script injection and chunked Response page issue

iRule issues

Loadbalancing issue

issue with URL after certificate renewal.