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Nikolay_Matveev's avatar
Nikolay_Matveev
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Mar 20, 2015

Universal persistence based on UDP payload - what event to use?

Could some body help to shed some light on the below, please? I have an application that sends loads of short UDP messages which I need to load balance across two servers. Sometimes the messages ar...
application delivery
design
devops
iRules
LTM
Nikolay_Matveev's avatar
Nikolay_Matveev
Icon for Nimbostratus rankNimbostratus
Mar 20, 2015

There is no session as such on the application side. The only timeout their protocol specifies relates to a timeslot which all parts of a chunked message should arrive within - and it's 5 seconds. Unfortunately this is not exactly what time-out for an entry in persistence table means.

 

Though I'm not really concerned about the timeout here. What confuses me is why I am seeing no entries in the persistence table when I am changing iRule event from CLIENT_ACCEPTED to CLIENT_DATA.

 

 

As per the screenshot above CLIENT_ACCEPTED events are supposed to be a subset of all CLIENT_DATA event in the context of UDP virtual servers but this does not seem to be the case in my scenario.