Re:Ask HN: What's The Most Expensive Mistake You've Made At ...
by warrenm on Wednesday September 07, 2022 @09:30AM
(#32750316)
>costing the company an extra $3 million in power usage per year
at $0.15/kwh, that's ~2300 excess kilowatts used per hour (~$340/hour)
You're saying you had 25,000 Dell servers[0] of a specific CPU combo that happened to have a fluke with RHEL power management?
I suppose that's possible - but it seems highly improbable
Even if you did, it's not a "customize the kickstart" problem, it's "write a post-deployment config script" issue that is far simpler to manage
After working in data center management and automation for over a decade, I can say your case is the first I ever heard of such a thing - and I would've told all my customers what I told you - have a single kickstart per major release of RHEL/CentOS, and do a post-deploy config if necessary :)
at $0.15/kwh, that's ~2300 excess kilowatts used per hour (~$340/hour)
You're saying you had 25,000 Dell servers[0] of a specific CPU combo that happened to have a fluke with RHEL power management?
I suppose that's possible - but it seems highly improbable
Even if you did, it's not a "customize the kickstart" problem, it's "write a post-deployment config script" issue that is far simpler to manage
After working in data center management and automation for over a decade, I can say your case is the first I ever heard of such a thing - and I would've told all my customers what I told you - have a single kickstart per major release of RHEL/CentOS, and do a post-deploy config if necessary :)
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[0] https://news.ycombinator.com/item?id=32692023