Forum Discussion

danielo303_1961's avatar
danielo303_1961
Icon for Nimbostratus rankNimbostratus
Feb 17, 2012

iRule: redirect to pool based on app response time?

I would like to use an iRule to direct traffic based on the response time of the back-end resource pool. Under normal operations, incoming requests (these are SOAP-based queries) will go to the primar...
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Hamish's avatar
Hamish
Icon for Cirrocumulus rankCirrocumulus
Feb 17, 2012
Hmm...

 

 

9.4.3 makes it a bit more difficult. I did something for this in 2010 on LDAP servers. But the iRule was designed to be pretty lightweight and the actual calculations for average response times etc was offloaded to a separate server, because different users were expected to have different SLA requirements. (See the LDAP_Stats_Measuring iRule).

 

 

The measurements and tracking of response times was tracked by user (ldap bind id), but it required tables. Assuming you don't need that... Hmm.. Not sure. Would need a bit more thought. Any chance you could upgrade to v10.2?

 

 

Even then though, you have the problem of working out when the response times decrease again... v11 you could use a sideband connection...

 

 

More thought required...

 

 

 

H