RE: re: My first blog post - ITM TEMS Stress Tester - http://ow.ly/jipc4

Looks good to me, John.

I would be tempted to add a more human-readable timestamp in the log, and maybe list how many STDEVs the current difference is from the mean, just so you can see at a glance when it starts to creep.

It looks like you don't need to modify the script, except to set your 'window', so I was confused by this on your blog:
"You may adjust this time as needed. The time must be in coordination with the action command script"
To me it looked like the time window is independent of your SIT settings, and I didn't see anything else that needed to be modified in the script.

Now, in the interest of science, we need to find some HTEMS to beat the snot out of to see if this data is a useful indicator of HTEMS health. What would be the easiest way to do that? Start running a bunch of the non-recommended SITs, such as file counters?

Thanks for sharing this,

-James


From: [email protected] [mailto:[email protected]] On Behalf Of John Alvord
Sent: Thursday, March 21, 2013 14:24
To: [email protected]
Subject: [TME10] re: My first blog post - ITM TEMS Stress Tester - http://ow.ly/jipc4

I am posting this with some trepidation.... first time and everything.

I was at Pulse 2013 and attended several Analytics sessions - quite eye opening.  On the way back home I decided an experiment would be useful to identify cases where a TEMS is under stress - on the way to a failure or high CPU or something bad.

150 LOC of well-commented  Perl and a very simple timer situation later, my tests seemed to prove out the idea. Of course tests are one thing and real life is another - so the next stage is to get some real world examples. At the moment the only output is a stress.log file and one of the values is the stress indicator.

Anyway, let me know what you think?

Regards,




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