Category Archives: Architecture

AWS EC2 Reserved Instance Auditing

If you’re running instances atop AWS, you’re probably at least bleeding money. If you don’t know what reserved instances are and/or aren’t using them, you are hemorrhaging money. One of the worst parts of AWS billing, is that they don’t … Continue reading

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Building Mapserver 6.4 and Mapcache 1.2 on Amazon Linux

  More for me than anything else, but building and installing Mapserver and its cache from source can be a pain. echo “/usr/local/lib” > /etc/ld.so.conf.d/xmaps.conf yum install libpng-devel libjpeg-turbo-devel gdal-devel libxml2-devel geos-devel cairo-devel gd gd-devel giflib-devel mysql-devel freetype-devel fribidi-devel proj-devel … Continue reading

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Which Oar Best Rows The Boat

Ted Dzuiba wrote a post that boiled down to identifying his own “language bigotry” as a step along the way to software engineering “Mastery”. He’s absolutely correct about introspecting¬†why¬†one chooses to “fight” other languages. And by saying “languages” I could … Continue reading

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SPDY for Apache

Mod_SPDY for Apache is out. If you don’t know what SPDY is, I’d recommend some light reading … or heavy reading if you’re that kind of person.  

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Video Captcha Prior Art

Nucaptcha claims to have invented video captchas. They didn’t. Neither did I, proabably, but I have talked about them publicly a few times, including this blog post from 2009.

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Caching Functions In Perl

Synopsis There are occasions, where you write a function that takes some parameters and outputs consistentish data. Example: sub add { my($first,$second)=@_; return $first + $second; } If you call add(1,1) you get 2: always. Consistent input yields consistent output. … Continue reading

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Merging Filesystems Virtually Under Apache

Synopsis This is rather old code, but saved my bacon more than once. Runs under Apache with Mod_Perl, and “merges” any number of filesystems. You’ll see the @docroots array that takes a list of “document roots”. These all need correct … Continue reading

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Reliance On GPS Is A Liability

I’ve written a couple times previously about how we shouldn’t rely on GPS solely. It appears the US government might have just come to that conclusion as well. GPS is awesome, but it cannot be the only mechanism used for … Continue reading

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Use MongoDB

So an Anonymous Coward’s pastebin rant against MongoDB has an awful lot of legs. I circulated a few thoughts yesterday morning to head-off the inevitable concerns of “um, we’re doing a lot with Mongo, and now I’m nervous”: [It] really … Continue reading

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SSL CAs Are An Unnecessary Evil

I’ve talked about this to numerous groups, going back to 1999, but seems I’ve never done so publicly. Certificate Authorities are completely unnecessary. “OH MY GOD HOW DO WE MAINTAIN THE WEB OF TRUST?!” you scream. Easy, the same way … Continue reading

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