Forum Discussion

Angel_Martinez_'s avatar
Angel_Martinez_
Icon for Nimbostratus rankNimbostratus
Dec 19, 2011

HSL vs log

Hi guys!

 

 

I've to deploy an iRule at 9.4.8 HF4 version just for debbuging network activity. So at once I though to do it using HSL but this feature is only available on 10.1.x in ahead...

 

 

So I dig at Wiki and log command also support sendding to a Syslog Server...

 

 

log 10.x.x.x:514 local0.info "My Message from iRule: [HTTP::uri]"

 

 

 

- I would like to know how much painful is this feature...

 

- Is the iRule stopped until the UDP message is released ¿?

 

 

 

 

application delivery
dev
devops
iRules
  • hooleylist's avatar
    hooleylist
    Icon for Cirrostratus rankCirrostratus
    Dec 19, 2011
    Hi Angel,

     

     

    Logging UDP syslog messages to a remote server should be fairly efficient and not add latency. I do think it's a blocking operation. But as it's UDP, TMM doesn't have to wait for the syslog server to respond to a connection attempt.

     

     

    HSL is very efficient in terms of CPU and memory usage. So I'd recommend using it once you're on 10.1 or higher.

     

     

    Aaron