Today was one of those hot days here in New England. We set power rates based on load on high days randomly sampled. They call this stuff "demand management" We use quite a lot of power here in our shop for lots of computers, so this here manager demanded some management of the power loads! Hehehe. Fortunately we were able…
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Of benching a wicked fast storage array with a very dodgy tcsh script…
Testing our new secret filesystem... no caching or silly business going on here, all raw spindles and extremely suspect but reproducible fork bombs courtesy of tcsh. Where hosts contains 20 machines... [root@localhost jcuff]# foreach h (`cat hosts`) foreach? ssh $h /mnt/share/jcuff/dd.sh $h & foreach? end And where dd.sh is simply a 16 way fork bomb: [root@localhost jcuff]# cat dd.sh #!/bin/tcsh foreach h…