By rickramsey on Dec 16, 2013
by Orgad Kimchi
My little brother and I used to drive our Sainted Mother mad with this game at bed time. We'd wait till she was stressed out, then throw something big, like a softball, against the wall. Being a worry-wart, she'd come into the room to find out which one of us had fallen out of his bed and broken his arm. We both pretended to be fast asleep, of course, and had already recovered the soft ball.
Perplexed, she would return to the kitchen. A short while later, we would throw the bat against the wall. After the initial boom against the sheetrock, it would clatter on the ground, making a sound similar to a mother's precious child cracking his skull on the cement steps in front of the house. Quickly one of us would recover it, tuck it under the sheets, and then we'd both return to our previous sleeping positions.
Little did we know, as we pushed our mother closer to the edge of Insanity, that our techniques would be adopted by virtualized environments the world over. As Orgad explains in the article above, as each virtualization product abstracts computing resources for isolation or other purposes, it creates a little brother. If something goes boom in the night or, if your environment starts hanging, how do you figure out where the problem is?
It's a super article, and well worth your time. If Mom had read it, we would have woken up inside an anthill, with only our heads sticking out so she could listen to our screams while she sipped a cup of Darjeeling.
Article: Performance Analysis in a Multitenant Cloud Environment
Performance analysis in a virtualized multitenant cloud environment is difficult because of the abstraction layers. How do you find the physical system resources that are overloaded? Orgad Kimchi explores four examples that show how you how with the built-in Oracle Solaris 11 tools.
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