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;

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irule performance issue

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