cyball - Slashdot User

Comment No big deal (Score 1) 129

by cyball on Wednesday August 11, 2010 @04:50AM (#33213020) Attached to: Extreme Memory Oversubscription For VMs

Really, this amount of overcommit is nothing. It's been done for decades.

I manage a little over 200 virtual servers, spread across 7 z/VM hypervisors, and 2 mainframes. They are currently running with overcommit ratios of 4.59:1, 3.87:1, 3.56:1, 2.05:1, 1.19:1, 1.19:1, and .9:1. And this is a relatively small shop and somewhat low overcommits for the environment.

That's one of the benefits of virtualization...and yes, I know that if all guests decided to allocate all of their memory at once, we'd drive the hypervisor paging subsystem up the wall. Actually, this did happen a few months ago and while everything was dog slow for a while, z/VM happily paged along with out issue.

NASA Creates First Global Forest Map Using Lasers 55

Posted by samzenpus on Wednesday July 21, 2010 @07:39PM from the if-a-tree-is-measured-and-nobody-is-around-to-see-it dept.

MikeCapone writes "Scientists, using three NASA satellites, have created a first-of-its-kind map that details the height of the world's forests. The data was collected from NASA's ICESat, Terra and Aqua satellites. The latter two satellites are responsible for most of NASA's Gulf spill imagery. The data collected will help scientists understand how the world's forests both store and process carbon. While there are many local and regional canopy maps, this is the very first global map using a uniform method for measure."

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