Forum Discussion
C_D_18583
Nimbostratus
NimbostratusConfiguring RAM Cache with iRules
Hi,
I'm new with configuring RAM Cache with iRules and need a little assistance.
We are going to test the RAM Cache to store some repeatedly loaded images
The plan is to cache only the certain images that are in a specific directory.
If content contains ‘trial_images’ subdirectory it should be cached and load balanced using INT_content pool else go to INT_weblogic1.
Here are the URLs http://tools.infra.dev1.ca/Test_Portal/content/en/techsup/trial_images/.../...
or
http://tools.infra.dev1.ca/Test_Portal/.../.../...
Here is part of the iRule requirement:
elseif { $uri starts_with "/Test_Portal" } {
if { If content contains ‘trial_images’ subdirectory it should be cached{BIG IP} and load balanced using INT_content pool} {
}
else { pool INT_weblogic1 }
}
Thanks
2 Replies
C_D_18583Colin
Thanks for your reply. I presume you can set the time out for cashing at the Virtual Server - profile ? Can this cache time out be set at the iRule?- Well, there's no direct way to set a timeout value per se, but you can achieve the same thing.
Since you can check the age of the data with CACHE::age and force it to expire (re-validate at the server level) with CACHE::expire, you can create some simple logic to enforce an effective timeout.
For a complete list of the commands available you can check out the iRules Wiki section on the Cache commands here: Click here
HTH,
Colin
