Blog

News and views from the Clarksys crew on all things cloud, cybersecurity, and scale.

95th Percentile Billing

What is the 95th percentile? The 95th percentile is a method for metering bandwidth that allows a customer to burst over their Committed Information Rate (CIR). Unlike a fixed network link, a customer is able subscribe to a CIR at a fraction (usually 10-20%) of the interface speed, but when…

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Formula to Calculate Margin

Just because I see this so often in spreadsheets: Costs * 1.Margin = Resale The proper way to apply a margin to your cost is: Cost / ( 1 - Margin) = Resale It makes a big difference on the final number: 100 * 1.3 = 130 100 / (…

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Boy Scouts and the Future

There is no way to explain the impact that Scouting has had on my life. Probably the simplest is the Scout Law: Trustworthy, Loyal, Helpful, Friendly, Courteous, Kind, Obedient, Cheerful, Thrifty, Brave, Clean & Reverent There is not a day of my life that that hasn't rattled through…

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2014 Resolutions

In the spirt of public accountability, here are my New Years resolutions: Migrate this Blog to Jekyll Loose 20 lbs before my Birthday (this is a pound a week – no problem). Accomplished via: sweat every day, make carbs the exception – not the rule, balance indoor life with the…

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HOWTO Trim comments and spaces from files

Trim comments and spaces from a file: $ grep ^[^#] file “The regex ^[^#] matches the first character of any line, as long as that character that is not a #. Because blank lines don’t have a first character they’re not matched either, resulting in a nice compact…

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Cogent Giving Away Transit?

From an email this morning: I wanted to follow up with you on Cogent’s promo that is running this month. I do know you have a year left with Level 3, and that would fit perfectly with what our promo has to offer. If you have 11…

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Reflections on 9/11

It’s been hard to not think about 9/11 today. Reading through Facebook posts from friends who were supposed to be in the towers, and of course friends and family that were lost that day has been very tough. I don’t really know how/why we started watching TV that morning. I’m…

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HOWTO Copy and Paste in OSX without Formatting

I’m an extensive user of ⌘+C / ⌘+V to copy and paste between application screens. One thing that has consistently driven me crazy is the intermediate step of pasting to plain text to remove formatting. I guess I finally had enough and found this gem over the weekend – it’s…

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Motivational Quotes

These were captured at a leadership/team building event back in October of 2010: Sometimes you have to go backwards to go forward. Failures lead to success. Easier from the outside looking in than being there. Pausing before next unknown step when any step is in fact forward progress.

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